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href="https://developers-cloudflare-com.translate.goog/fundamentals/concepts/free-plan/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Our free plan</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/reference-architecture/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Reference architectures ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/concepts/the-internet/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">The Internet</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="1"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">How to use Cloudflare</span> </div> <svg 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class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/create-account/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Create account</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/verify-email-address/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Verify email address</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/login/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Log into Cloudflare</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/manage-email-notifications/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Manage email notifications</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="16"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Account security</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/abuse-contact/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Add abuse contact</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/cloudflare-access/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Allow Cloudflare access</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/leaked-password-notifications/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Leaked Password Notifications</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/login-and-account-issues/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Login and account issues</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/manage-active-sessions/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Manage active sessions</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/multi-factor-email-authentication/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Multi-Factor Email Authentication</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/scim-setup/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Provision with SCIM</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/review-audit-logs/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Review audit logs</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/secure-a-compromised-account/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Secure compromised account</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/cloudflare-one/applications/configure-apps/dash-sso-apps/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Set up SSO ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/2fa/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Two-factor authentication</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/account-security/zone-holds/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Zone holds</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="17"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Account customizations</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/customize-account/account-name/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Account name</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/customize-account/appearance/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Appearance</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/customize-account/communication-preference/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Communication preferences</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/account/customize-account/language-preference/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Language preference</span> </a></li> </ul> </details></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="7"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Manage domains</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/add-site/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Add a site</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/add-multiple-sites-automation/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Add multiple sites via automation</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/domain-version/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Change your domain version</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/connect-your-domain/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Connect your domain</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/manage-subdomains/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Manage subdomains</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/move-domain/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Move a domain between Cloudflare accounts</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/pause-cloudflare/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Pause Cloudflare</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/redirect-domain/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Redirect one domain to another</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/remove-domain/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Remove a domain</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-domains/star-zones/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Star domains</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="8"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Manage members</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-members/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-members/manage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Manage</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-members/policies/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Policies</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-members/roles/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Roles</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/manage-members/scope/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Role scopes</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/cloudflare-one/applications/configure-apps/dash-sso-apps/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Set up SSO ↗</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/accounts-and-zones/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Accounts, zones, and profiles</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/find-account-and-zone-ids/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Find zone and account IDs</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/use-cloudflare-without-changing-nameservers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Use Cloudflare without changing nameservers</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/setup/troubleshooting/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Troubleshooting</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="2"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Subscriptions and billing</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/create-billing-profile/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Create billing profile</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/support/account-management-billing/billing-cloudflare-plans/cloudflare-billing-policy/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Billing Policy ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/cancel-subscription/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Cancel Cloudflare subscriptions</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/change-plan/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Change domain plan</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/change-password-or-email/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Change password or email</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/change-super-admin/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Change Super Administrator</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/delete-account/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Delete your Cloudflare account</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/preview-services/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Preview services</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/troubleshooting-failed-payments/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Troubleshoot failed payments</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/understand-invoices/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Understand Cloudflare invoices</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/subscriptions-and-billing/update-billing-info/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Update billing information</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="3"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Basic tasks</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/improve-seo/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Improve SEO</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/interact-with-cloudflare/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Interacting with Cloudflare</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/maintenance-mode/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Maintenance mode</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/minimize-downtime/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Minimize downtime</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/speed/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Optimize site speed ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/preparing-for-surges-or-spikes-in-web-traffic/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Prepare for surges or spikes in web traffic</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/learning-paths/prevent-ddos-attacks/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Prevent DDoS attacks ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/protect-your-origin-server/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Protect your origin server</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/recovering-from-hacked-site/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Recovering from a hacked site</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/pci-scans/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Scan for PCI compliance</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/learning-paths/application-security/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Secure your website ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/test-speed/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Test speed</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="9"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Trace a request</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/trace-request/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/trace-request/how-to/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Use Cloudflare Trace</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/trace-request/limitations/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Limitations</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/trace-request/changelog/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Changelog</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/basic-tasks/under-ddos-attack/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Under a DDoS attack?</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="4"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Cloudflare's API</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="10"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Get started</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/get-started/create-token/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Create API token</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/get-started/keys/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Get Global API key (legacy)</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/get-started/ca-keys/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Get Origin CA keys</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/get-started/account-owned-tokens/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Account Owned Tokens</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="11"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">How to</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/how-to/make-api-calls/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Make API calls</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/how-to/create-via-api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Create tokens via API</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/how-to/control-api-access/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Control API Access</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/how-to/restrict-tokens/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Restrict tokens</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/how-to/roll-token/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Roll tokens</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="12"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Reference</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/reference/limits/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Limits</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/reference/permissions/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">API token permissions</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/reference/template/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">API token templates</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/reference/deprecations/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">API deprecations</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/reference/sdks/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">SDKs</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/troubleshooting/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Troubleshooting</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="13"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Building custom views</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/api/building-custom-dashboards/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> </ul> </details></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details open 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<path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/policies-compliances/cloudflare-cookies/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Cloudflare Cookies</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/policies-compliances/compliance-docs/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Compliance documentation</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/policies-compliances/content-security-policies/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span 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href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#x-forwarded-proto" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">X-Forwarded-Proto</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ray" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-RAY</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ipcountry" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-IPCountry</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-visitor" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Visitor</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cdn-loop" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CDN-Loop</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-worker" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Worker</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#connection" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">Connection</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#considerations-for-spectrum" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">Considerations for Spectrum</span> </a></li> </ul> </div> </details> </nav> </mobile-starlight-toc> <script type="module" src="/_astro/MobileTableOfContents.astro_astro_type_script_index_0_lang.C181hMzK.js"></script> </div> <div class="right-sidebar-panel sl-hidden lg:sl-block astro-pb3aqygn"> <div class="sl-container astro-pb3aqygn"> <starlight-toc data-min-h="2" data-max-h="3"> <nav 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class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Connecting-IP</span> </a> <ul class="astro-g2bywc46" style="--depth: 1;"> <li class="astro-g2bywc46" style="--depth: 1;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-connecting-ip-in-worker-subrequests" class="astro-g2bywc46" style="--depth: 1;"> <span class="astro-g2bywc46" style="--depth: 1;">CF-Connecting-IP in Worker subrequests</span> </a></li> </ul></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-connecting-ipv6" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Connecting-IPv6</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ew-via" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-EW-Via</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-pseudo-ipv4" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Pseudo-IPv4</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#true-client-ip-enterprise-plan-only" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">True-Client-IP (Enterprise plan only)</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#x-forwarded-for" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">X-Forwarded-For</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#x-forwarded-proto" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">X-Forwarded-Proto</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ray" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-RAY</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ipcountry" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-IPCountry</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-visitor" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Visitor</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cdn-loop" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CDN-Loop</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-worker" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">CF-Worker</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#connection" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">Connection</span> </a></li> <li class="astro-g2bywc46" style="--depth: 0;"><a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#considerations-for-spectrum" class="astro-g2bywc46" style="--depth: 0;"> <span class="astro-g2bywc46" style="--depth: 0;">Considerations for Spectrum</span> </a></li> </ul> </nav> </starlight-toc> <script type="module" 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additional headers as specified below.</p> <aside aria-label="Note" class="starlight-aside starlight-aside--note"> <p class="starlight-aside__title" aria-hidden="true"> <svg viewbox="0 0 24 24" width="16" height="16" fill="currentColor" class="starlight-aside__icon"> <path d="M12 11C11.7348 11 11.4804 11.1054 11.2929 11.2929C11.1054 11.4804 11 11.7348 11 12V16C11 16.2652 11.1054 16.5196 11.2929 16.7071C11.4804 16.8946 11.7348 17 12 17C12.2652 17 12.5196 16.8946 12.7071 16.7071C12.8946 16.5196 13 16.2652 13 16V12C13 11.7348 12.8946 11.4804 12.7071 11.2929C12.5196 11.1054 12.2652 11 12 11ZM12.38 7.08C12.1365 6.97998 11.8635 6.97998 11.62 7.08C11.4973 7.12759 11.3851 7.19896 11.29 7.29C11.2017 7.3872 11.1306 7.49882 11.08 7.62C11.024 7.73868 10.9966 7.86882 11 8C10.9992 8.13161 11.0245 8.26207 11.0742 8.38391C11.124 8.50574 11.1973 8.61656 11.29 8.71C11.3872 8.79833 11.4988 8.86936 11.62 8.92C11.7715 8.98224 11.936 9.00632 12.099 8.99011C12.2619 8.97391 12.4184 8.91792 12.5547 8.82707C12.691 8.73622 12.8029 8.61328 12.8805 8.46907C12.9582 8.32486 12.9992 8.16378 13 8C12.9963 7.73523 12.8927 7.48163 12.71 7.29C12.6149 7.19896 12.5028 7.12759 12.38 7.08ZM12 2C10.0222 2 8.08879 2.58649 6.4443 3.6853C4.79981 4.78412 3.51809 6.3459 2.76121 8.17317C2.00433 10.0004 1.8063 12.0111 2.19215 13.9509C2.578 15.8907 3.53041 17.6725 4.92894 19.0711C6.32746 20.4696 8.10929 21.422 10.0491 21.8079C11.9889 22.1937 13.9996 21.9957 15.8268 21.2388C17.6541 20.4819 19.2159 19.2002 20.3147 17.5557C21.4135 15.9112 22 13.9778 22 12C22 10.6868 21.7413 9.38642 21.2388 8.17317C20.7363 6.95991 19.9997 5.85752 19.0711 4.92893C18.1425 4.00035 17.0401 3.26375 15.8268 2.7612C14.6136 2.25866 13.3132 2 12 2ZM12 20C10.4178 20 8.87104 19.5308 7.55544 18.6518C6.23985 17.7727 5.21447 16.5233 4.60897 15.0615C4.00347 13.5997 3.84504 11.9911 4.15372 10.4393C4.4624 8.88743 5.22433 7.46197 6.34315 6.34315C7.46197 5.22433 8.88743 4.4624 10.4393 4.15372C11.9911 3.84504 13.5997 4.00346 15.0615 4.60896C16.5233 5.21447 17.7727 6.23984 18.6518 7.55544C19.5308 8.87103 20 10.4177 20 12C20 14.1217 19.1572 16.1566 17.6569 17.6569C16.1566 19.1571 14.1217 20 12 20Z" /> </svg>Note</p> <div class="starlight-aside__content"> <p>Cloudflare may remove HTTP request headers with names considered invalid <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nginx.org/en/docs/http/ngx_http_core_module.html%23ignore_invalid_headers" target="_blank" rel="noopener">according to NGINX<span> ↗</span></a> — for example, header names containing a <code dir="auto">.</code> (dot) character.</p> </div> </aside> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="accept-encoding">Accept-Encoding</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#accept-encoding"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>For incoming requests, the value of this header will always be set to <code dir="auto">accept-encoding: br, gzip</code>. If the client set a different value, such as <code dir="auto">accept-encoding: deflate</code>, it will be overwritten and the original value will be available in <code dir="auto">request.cf.clientAcceptEncoding</code>.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-connecting-ip">CF-Connecting-IP</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-connecting-ip"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p><code dir="auto">CF-Connecting-IP</code> provides the client IP address connecting to Cloudflare to the origin web server. This header will only be sent on the traffic from Cloudflare's edge to your origin web server.</p> <p>For guidance on logging your visitor’s original IP address, refer to <a href="https://developers-cloudflare-com.translate.goog/support/troubleshooting/restoring-visitor-ips/restoring-original-visitor-ips/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">Restoring original visitor IPs</a>.</p> <p>Alternatively, if you do not wish to receive the <code dir="auto">CF-Connecting-IP</code> header or any HTTP header that may contain the visitor's IP address, <a href="https://developers-cloudflare-com.translate.goog/rules/transform/managed-transforms/configure/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">enable the <strong>Remove visitor IP headers</strong> Managed Transform</a>.</p> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="cf-connecting-ip-in-worker-subrequests">CF-Connecting-IP in Worker subrequests</h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-connecting-ip-in-worker-subrequests"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>In same-zone Worker subrequests, the value of <code dir="auto">CF-Connecting-IP</code> reflects the value of <code dir="auto">x-real-ip</code> (the client’s IP). <code dir="auto">x-real-ip</code> can be altered by the user in their Worker script.</p> <p>In cross-zone subrequests from one Cloudflare zone to another Cloudflare zone, the <code dir="auto">CF-Connecting-IP</code> value will be set to the Worker client IP address <code dir="auto">'2a06:98c0:3600::103'</code> for security reasons.</p> <p>For Worker subrequests destined for a non-Cloudflare customer zone, the <code dir="auto">CF-Connecting-IP</code> and <code dir="auto">x-real-ip</code> headers will both reflect the client's IP address, with only the <code dir="auto">x-real-ip</code> header able to be altered.</p> <p>When no Worker subrequest is triggered, <code dir="auto">cf-connecting-ip</code> reflects the client's IP address and the <code dir="auto">x-real-ip</code> header is stripped.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-connecting-ipv6">CF-Connecting-IPv6</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-connecting-ipv6"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>Cloudflare provides <a href="https://developers-cloudflare-com.translate.goog/network/ipv6-compatibility/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">free IPv6 support</a> to all domains without requiring additional configuration or hardware. To support migrating to IPv6, Cloudflare's <a href="https://developers-cloudflare-com.translate.goog/network/pseudo-ipv4/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">Pseudo IPv4</a> provides an IPv6 to IPv4 translation service for all Cloudflare domains.</p> <p>If <strong>Pseudo IPv4</strong> is set to <code dir="auto">Overwrite Headers</code> - Cloudflare overwrites the existing <code dir="auto">Cf-Connecting-IP</code> and <code dir="auto">X-Forwarded-For</code> headers with a pseudo IPv4 address while preserving the real IPv6 address in <code dir="auto">CF-Connecting-IPv6</code> header.</p><br> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-ew-via">CF-EW-Via</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ew-via"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>This header is used for loop detection, similar to the <code dir="auto">CDN-Loop</code> <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://blog.cloudflare.com/preventing-request-loops-using-cdn-loop/" target="_blank" rel="noopener">header<span> ↗</span></a>.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-pseudo-ipv4">CF-Pseudo-IPv4</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-pseudo-ipv4"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>If <a href="https://developers-cloudflare-com.translate.goog/network/pseudo-ipv4/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">Pseudo IPv4</a> is set to <code dir="auto">Add Header</code> - Cloudflare automatically adds the <code dir="auto">CF-Pseudo-IPv4</code> header with a Class E IPv4 address hashed from the original IPv6 address.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="true-client-ip-enterprise-plan-only">True-Client-IP (Enterprise plan only)</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#true-client-ip-enterprise-plan-only"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p><code dir="auto">True-Client-IP</code> provides the original client IP address to the origin web server. <code dir="auto">True-Client-IP</code> is only available on an Enterprise plan. In the example below, <code dir="auto">203.0.113.1</code> is the original visitor IP address. For example: <code dir="auto">True-Client-IP: 203.0.113.1</code></p> <p>There is no difference between the <code dir="auto">True-Client-IP</code> and <code dir="auto">CF-Connecting-IP</code> headers besides the name of the header. Some Enterprise customers with legacy devices need <code dir="auto">True-Client-IP</code> to avoid updating firewalls or load-balancers to read a custom header name.</p> <p>To add a <code dir="auto">True-Client-IP</code> HTTP header to requests, <a href="https://developers-cloudflare-com.translate.goog/rules/transform/managed-transforms/configure/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">enable the <strong>Add "True-Client-IP" header</strong> Managed Transform</a>.</p> <p>Alternatively, if you do not wish to receive the <code dir="auto">True-Client-IP</code> header or any HTTP header that may contain the visitor's IP address, <a href="https://developers-cloudflare-com.translate.goog/rules/transform/managed-transforms/configure/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">enable the <strong>Remove visitor IP headers</strong> Managed Transform</a>.</p> <aside aria-label="Warning" class="starlight-aside starlight-aside--caution"> <p class="starlight-aside__title" aria-hidden="true"> <svg viewbox="0 0 24 24" width="16" height="16" fill="currentColor" class="starlight-aside__icon"> <path d="M12 16C11.8022 16 11.6089 16.0587 11.4444 16.1686C11.28 16.2784 11.1518 16.4346 11.0761 16.6173C11.0004 16.8001 10.9806 17.0011 11.0192 17.1951C11.0578 17.3891 11.153 17.5673 11.2929 17.7071C11.4327 17.847 11.6109 17.9422 11.8049 17.9808C11.9989 18.0194 12.2 17.9996 12.3827 17.9239C12.5654 17.8482 12.7216 17.72 12.8315 17.5556C12.9413 17.3911 13 17.1978 13 17C13 16.7348 12.8946 16.4805 12.7071 16.2929C12.5196 16.1054 12.2652 16 12 16ZM22.67 17.47L14.62 3.47003C14.3598 3.00354 13.9798 2.61498 13.5192 2.3445C13.0586 2.07401 12.5341 1.9314 12 1.9314C11.4659 1.9314 10.9414 2.07401 10.4808 2.3445C10.0202 2.61498 9.64019 3.00354 9.38 3.47003L1.38 17.47C1.11079 17.924 0.966141 18.441 0.960643 18.9688C0.955144 19.4966 1.089 20.0166 1.34868 20.4761C1.60837 20.9356 1.9847 21.3185 2.43968 21.5861C2.89466 21.8536 3.41218 21.9964 3.94 22H20.06C20.5921 22.0053 21.1159 21.8689 21.5779 21.6049C22.0399 21.341 22.4234 20.9589 22.689 20.4978C22.9546 20.0368 23.0928 19.5134 23.0895 18.9814C23.0862 18.4493 22.9414 17.9277 22.67 17.47ZM20.94 19.47C20.8523 19.626 20.7245 19.7556 20.5697 19.8453C20.4149 19.935 20.2389 19.9815 20.06 19.98H3.94C3.76111 19.9815 3.5851 19.935 3.43032 19.8453C3.27553 19.7556 3.14765 19.626 3.06 19.47C2.97223 19.318 2.92602 19.1456 2.92602 18.97C2.92602 18.7945 2.97223 18.622 3.06 18.47L11.06 4.47003C11.1439 4.30623 11.2714 4.16876 11.4284 4.07277C11.5855 3.97678 11.766 3.92599 11.95 3.92599C12.134 3.92599 12.3145 3.97678 12.4716 4.07277C12.6286 4.16876 12.7561 4.30623 12.84 4.47003L20.89 18.47C20.9892 18.6199 21.0462 18.7937 21.055 18.9732C21.0638 19.1527 21.0241 19.3312 20.94 19.49V19.47ZM12 8.00003C11.7348 8.00003 11.4804 8.10538 11.2929 8.29292C11.1054 8.48046 11 8.73481 11 9.00003V13C11 13.2652 11.1054 13.5196 11.2929 13.7071C11.4804 13.8947 11.7348 14 12 14C12.2652 14 12.5196 13.8947 12.7071 13.7071C12.8946 13.5196 13 13.2652 13 13V9.00003C13 8.73481 12.8946 8.48046 12.7071 8.29292C12.5196 8.10538 12.2652 8.00003 12 8.00003Z" /> </svg>Warning</p> <div class="starlight-aside__content"> <p>If you are using Cloudflare in a stacked CDN and authenticating HTTP requests based on the IP address value in the <code dir="auto">True-Client-IP</code> header, you must add a <code dir="auto">True-Client-IP</code> header to your requests. If you do not add this header, its value can be spoofed to any value.</p> </div> </aside> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="x-forwarded-for">X-Forwarded-For</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#x-forwarded-for"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p><code dir="auto">X-Forwarded-For</code> maintains proxy server and original visitor IP addresses. If there was no existing <code dir="auto">X-Forwarded-For</code>header in the request sent to Cloudflare, <code dir="auto">X-Forwarded-For</code> has an identical value to the <code dir="auto">CF-Connecting-IP</code> header.</p> <p>For example, if the original visitor IP address is <code dir="auto">203.0.113.1</code> and the request sent to Cloudflare does not contain an <code dir="auto">X-Forwarded-For</code> header, then Cloudflare will send <code dir="auto">X-Forwarded-For: 203.0.113.1</code> to the origin.</p> <p>If, on the other hand, an <code dir="auto">X-Forwarded-For</code> header was already present in the request to Cloudflare, Cloudflare will append the IP address of the HTTP proxy connecting to Cloudflare to the header. For example, if the original visitor IP address is <code dir="auto">203.0.113.1</code> and a request is proxied through two proxies: proxy A with an IP address of <code dir="auto">198.51.100.101</code> and proxy B with an IP address of <code dir="auto">198.51.100.102</code> before being proxied to Cloudflare, then Cloudflare will send <code dir="auto">X-Forwarded-For: 203.0.113.1,198.51.100.101,198.51.100.102</code> to the origin. Proxy A will append the original visitor's IP address (<code dir="auto">203.0.113.1</code>) to <code dir="auto">X-Forwarded-For</code> before proxying the request to proxy B which, in turn, will append Proxy A's IP address (<code dir="auto">198.51.100.101</code>) to <code dir="auto">X-Forwarded-For</code> before proxying the request to Cloudflare. And finally, Cloudflare will append proxy B's IP address (<code dir="auto">198.51.100.102</code>) to <code dir="auto">X-Forwarded-For</code> before proxying the request to the origin.</p> <p>If you do not wish to receive the visitor's IP address in the <code dir="auto">X-Forwarded-For</code> header, or any HTTP header that may contain the visitor's IP address, <a href="https://developers-cloudflare-com.translate.goog/rules/transform/managed-transforms/configure/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">enable the <strong>Remove visitor IP headers</strong> Managed Transform</a>.</p> <aside aria-label="Note" class="starlight-aside starlight-aside--note"> <p class="starlight-aside__title" aria-hidden="true"> <svg viewbox="0 0 24 24" width="16" height="16" fill="currentColor" class="starlight-aside__icon"> <path d="M12 11C11.7348 11 11.4804 11.1054 11.2929 11.2929C11.1054 11.4804 11 11.7348 11 12V16C11 16.2652 11.1054 16.5196 11.2929 16.7071C11.4804 16.8946 11.7348 17 12 17C12.2652 17 12.5196 16.8946 12.7071 16.7071C12.8946 16.5196 13 16.2652 13 16V12C13 11.7348 12.8946 11.4804 12.7071 11.2929C12.5196 11.1054 12.2652 11 12 11ZM12.38 7.08C12.1365 6.97998 11.8635 6.97998 11.62 7.08C11.4973 7.12759 11.3851 7.19896 11.29 7.29C11.2017 7.3872 11.1306 7.49882 11.08 7.62C11.024 7.73868 10.9966 7.86882 11 8C10.9992 8.13161 11.0245 8.26207 11.0742 8.38391C11.124 8.50574 11.1973 8.61656 11.29 8.71C11.3872 8.79833 11.4988 8.86936 11.62 8.92C11.7715 8.98224 11.936 9.00632 12.099 8.99011C12.2619 8.97391 12.4184 8.91792 12.5547 8.82707C12.691 8.73622 12.8029 8.61328 12.8805 8.46907C12.9582 8.32486 12.9992 8.16378 13 8C12.9963 7.73523 12.8927 7.48163 12.71 7.29C12.6149 7.19896 12.5028 7.12759 12.38 7.08ZM12 2C10.0222 2 8.08879 2.58649 6.4443 3.6853C4.79981 4.78412 3.51809 6.3459 2.76121 8.17317C2.00433 10.0004 1.8063 12.0111 2.19215 13.9509C2.578 15.8907 3.53041 17.6725 4.92894 19.0711C6.32746 20.4696 8.10929 21.422 10.0491 21.8079C11.9889 22.1937 13.9996 21.9957 15.8268 21.2388C17.6541 20.4819 19.2159 19.2002 20.3147 17.5557C21.4135 15.9112 22 13.9778 22 12C22 10.6868 21.7413 9.38642 21.2388 8.17317C20.7363 6.95991 19.9997 5.85752 19.0711 4.92893C18.1425 4.00035 17.0401 3.26375 15.8268 2.7612C14.6136 2.25866 13.3132 2 12 2ZM12 20C10.4178 20 8.87104 19.5308 7.55544 18.6518C6.23985 17.7727 5.21447 16.5233 4.60897 15.0615C4.00347 13.5997 3.84504 11.9911 4.15372 10.4393C4.4624 8.88743 5.22433 7.46197 6.34315 6.34315C7.46197 5.22433 8.88743 4.4624 10.4393 4.15372C11.9911 3.84504 13.5997 4.00346 15.0615 4.60896C16.5233 5.21447 17.7727 6.23984 18.6518 7.55544C19.5308 8.87103 20 10.4177 20 12C20 14.1217 19.1572 16.1566 17.6569 17.6569C16.1566 19.1571 14.1217 20 12 20Z" /> </svg>Note</p> <div class="starlight-aside__content"> <p>To restore the original visitor IP address at your origin web server, Cloudflare recommends that your logs or applications look at <code dir="auto">CF-Connecting-IP</code> or <code dir="auto">True-Client-IP</code> instead of <code dir="auto">X-Forwarded-For</code>. <code dir="auto">CF-Connecting-IP</code> and <code dir="auto">True-Client-IP</code> both have a consistent format containing only one IP address.</p> </div> </aside> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="x-forwarded-proto">X-Forwarded-Proto</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#x-forwarded-proto"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p><code dir="auto">X-Forwarded-Proto</code> is used to identify the protocol (HTTP or HTTPS) that Cloudflare uses to connect to origin web server. By default, it is <code dir="auto">http</code>. Certain <a href="https://developers-cloudflare-com.translate.goog/ssl/origin-configuration/ssl-modes/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">encryption mode</a> may change this header to <code dir="auto">https</code> if the connection is encrypted.</p> <p>For incoming requests, the value of this header will be set to the protocol the client used (<code dir="auto">http</code> or <code dir="auto">https</code>). If the client set a different value, it will be overwritten.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-ray">CF-RAY</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ray"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>The <code dir="auto">CF-ray</code> header (otherwise known as a <a href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/cloudflare-ray-id/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">Ray ID</a>) is a hashed value that encodes information about the data center and the visitor’s request. For example: <code dir="auto">CF-RAY: 230b030023ae2822-SJC</code>.</p> <p>Add the <a href="https://developers-cloudflare-com.translate.goog/support/troubleshooting/general-troubleshooting/gathering-information-for-troubleshooting-sites/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#add-the-cf-ray-header-to-your-logs"><code dir="auto">CF-Ray</code> header to your origin web server logs</a> to match requests proxied to Cloudflare to requests in your server logs.</p> <p>Enterprise customers can also see all requests via <a href="https://developers-cloudflare-com.translate.goog/logs/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">Cloudflare Logs</a>.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-ipcountry">CF-IPCountry</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-ipcountry"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>The <code dir="auto">CF-IPCountry</code> header contains a two-character country code of the originating visitor’s country.</p> <p>Besides the <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://www.iso.org/iso-3166-country-codes.html" target="_blank" rel="noopener">ISO-3166-1 alpha-2 codes<span> ↗</span></a>, Cloudflare uses the following special country codes:</p> <ul> <li><code dir="auto">XX</code> - Used for clients without country code data.</li> <li><code dir="auto">T1</code> - Used for clients using the Tor network.</li> </ul> <p>To add this header to requests, along with other HTTP headers with location information for the visitor's IP address, <a href="https://developers-cloudflare-com.translate.goog/rules/transform/managed-transforms/configure/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB">enable the <strong>Add visitor location headers</strong> Managed Transform</a>.</p> <aside aria-label="Note" class="starlight-aside starlight-aside--note"> <p class="starlight-aside__title" aria-hidden="true"> <svg viewbox="0 0 24 24" width="16" height="16" fill="currentColor" class="starlight-aside__icon"> <path d="M12 11C11.7348 11 11.4804 11.1054 11.2929 11.2929C11.1054 11.4804 11 11.7348 11 12V16C11 16.2652 11.1054 16.5196 11.2929 16.7071C11.4804 16.8946 11.7348 17 12 17C12.2652 17 12.5196 16.8946 12.7071 16.7071C12.8946 16.5196 13 16.2652 13 16V12C13 11.7348 12.8946 11.4804 12.7071 11.2929C12.5196 11.1054 12.2652 11 12 11ZM12.38 7.08C12.1365 6.97998 11.8635 6.97998 11.62 7.08C11.4973 7.12759 11.3851 7.19896 11.29 7.29C11.2017 7.3872 11.1306 7.49882 11.08 7.62C11.024 7.73868 10.9966 7.86882 11 8C10.9992 8.13161 11.0245 8.26207 11.0742 8.38391C11.124 8.50574 11.1973 8.61656 11.29 8.71C11.3872 8.79833 11.4988 8.86936 11.62 8.92C11.7715 8.98224 11.936 9.00632 12.099 8.99011C12.2619 8.97391 12.4184 8.91792 12.5547 8.82707C12.691 8.73622 12.8029 8.61328 12.8805 8.46907C12.9582 8.32486 12.9992 8.16378 13 8C12.9963 7.73523 12.8927 7.48163 12.71 7.29C12.6149 7.19896 12.5028 7.12759 12.38 7.08ZM12 2C10.0222 2 8.08879 2.58649 6.4443 3.6853C4.79981 4.78412 3.51809 6.3459 2.76121 8.17317C2.00433 10.0004 1.8063 12.0111 2.19215 13.9509C2.578 15.8907 3.53041 17.6725 4.92894 19.0711C6.32746 20.4696 8.10929 21.422 10.0491 21.8079C11.9889 22.1937 13.9996 21.9957 15.8268 21.2388C17.6541 20.4819 19.2159 19.2002 20.3147 17.5557C21.4135 15.9112 22 13.9778 22 12C22 10.6868 21.7413 9.38642 21.2388 8.17317C20.7363 6.95991 19.9997 5.85752 19.0711 4.92893C18.1425 4.00035 17.0401 3.26375 15.8268 2.7612C14.6136 2.25866 13.3132 2 12 2ZM12 20C10.4178 20 8.87104 19.5308 7.55544 18.6518C6.23985 17.7727 5.21447 16.5233 4.60897 15.0615C4.00347 13.5997 3.84504 11.9911 4.15372 10.4393C4.4624 8.88743 5.22433 7.46197 6.34315 6.34315C7.46197 5.22433 8.88743 4.4624 10.4393 4.15372C11.9911 3.84504 13.5997 4.00346 15.0615 4.60896C16.5233 5.21447 17.7727 6.23984 18.6518 7.55544C19.5308 8.87103 20 10.4177 20 12C20 14.1217 19.1572 16.1566 17.6569 17.6569C16.1566 19.1571 14.1217 20 12 20Z" /> </svg>Note</p> <div class="starlight-aside__content"> <p>The <code dir="auto">CF-IPCountry</code> header is removed from requests made from a Worker to an origin that is not proxied behind Cloudflare.</p> </div> </aside> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-visitor">CF-Visitor</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-visitor"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>Currently, this header is a JSON object, containing only one key called “scheme”. The header will be either HTTP or HTTPS, and it is only relevant if you need to enable Flexible SSL in your Cloudflare settings. For example: <code dir="auto">CF-Visitor: { \"scheme\":\"https\"}</code>.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cdn-loop">CDN-Loop</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cdn-loop"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p><code dir="auto">CDN-Loop</code> allows Cloudflare to specify how many times a request can enter Cloudflare's network before it is blocked as a looping request. For example: <code dir="auto">CDN-Loop: cloudflare</code></p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="cf-worker">CF-Worker</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cf-worker"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>The <code dir="auto">CF-Worker</code> request header is added to an edge Worker subrequest that identifies the host that spawned the subrequest. This is useful when you want to protect yourself against cross-zone worker subrequests. For example: <code dir="auto">CF-Worker: example.com</code>.</p> <p>You can add <code dir="auto">CF-Worker</code> header on server logs similar to the way you add the <a href="https://developers-cloudflare-com.translate.goog/support/troubleshooting/general-troubleshooting/gathering-information-for-troubleshooting-sites/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#add-the-cf-ray-header-to-your-logs"><code dir="auto">CF-RAY</code></a> header. To do that, add <code dir="auto">$http_cf_worker</code> in the log format file: <code dir="auto">log_format cf_custom "CF-Worker:$http_cf_worker"'</code></p> <p><code dir="auto">CF-Worker</code> is added to all Worker subrequests sent via <code dir="auto">fetch()</code>. It is set to the name of the zone which owns the Worker making the subrequest. For example, a Worker script on route for <code dir="auto">foo.example.com/*</code> from <code dir="auto">example.com</code> will have all subrequests with the header:</p> <p><code dir="auto">CF-Worker</code>: <code dir="auto">example.com</code></p> <p>The intended purpose of this header is to provide a means for recipients (for example, origins, load balancers, other Workers) to recognize, filter, and route traffic generated by Workers on specific zones.</p> <aside aria-label="Note" class="starlight-aside starlight-aside--note"> <p class="starlight-aside__title" aria-hidden="true"> <svg viewbox="0 0 24 24" width="16" height="16" fill="currentColor" class="starlight-aside__icon"> <path d="M12 11C11.7348 11 11.4804 11.1054 11.2929 11.2929C11.1054 11.4804 11 11.7348 11 12V16C11 16.2652 11.1054 16.5196 11.2929 16.7071C11.4804 16.8946 11.7348 17 12 17C12.2652 17 12.5196 16.8946 12.7071 16.7071C12.8946 16.5196 13 16.2652 13 16V12C13 11.7348 12.8946 11.4804 12.7071 11.2929C12.5196 11.1054 12.2652 11 12 11ZM12.38 7.08C12.1365 6.97998 11.8635 6.97998 11.62 7.08C11.4973 7.12759 11.3851 7.19896 11.29 7.29C11.2017 7.3872 11.1306 7.49882 11.08 7.62C11.024 7.73868 10.9966 7.86882 11 8C10.9992 8.13161 11.0245 8.26207 11.0742 8.38391C11.124 8.50574 11.1973 8.61656 11.29 8.71C11.3872 8.79833 11.4988 8.86936 11.62 8.92C11.7715 8.98224 11.936 9.00632 12.099 8.99011C12.2619 8.97391 12.4184 8.91792 12.5547 8.82707C12.691 8.73622 12.8029 8.61328 12.8805 8.46907C12.9582 8.32486 12.9992 8.16378 13 8C12.9963 7.73523 12.8927 7.48163 12.71 7.29C12.6149 7.19896 12.5028 7.12759 12.38 7.08ZM12 2C10.0222 2 8.08879 2.58649 6.4443 3.6853C4.79981 4.78412 3.51809 6.3459 2.76121 8.17317C2.00433 10.0004 1.8063 12.0111 2.19215 13.9509C2.578 15.8907 3.53041 17.6725 4.92894 19.0711C6.32746 20.4696 8.10929 21.422 10.0491 21.8079C11.9889 22.1937 13.9996 21.9957 15.8268 21.2388C17.6541 20.4819 19.2159 19.2002 20.3147 17.5557C21.4135 15.9112 22 13.9778 22 12C22 10.6868 21.7413 9.38642 21.2388 8.17317C20.7363 6.95991 19.9997 5.85752 19.0711 4.92893C18.1425 4.00035 17.0401 3.26375 15.8268 2.7612C14.6136 2.25866 13.3132 2 12 2ZM12 20C10.4178 20 8.87104 19.5308 7.55544 18.6518C6.23985 17.7727 5.21447 16.5233 4.60897 15.0615C4.00347 13.5997 3.84504 11.9911 4.15372 10.4393C4.4624 8.88743 5.22433 7.46197 6.34315 6.34315C7.46197 5.22433 8.88743 4.4624 10.4393 4.15372C11.9911 3.84504 13.5997 4.00346 15.0615 4.60896C16.5233 5.21447 17.7727 6.23984 18.6518 7.55544C19.5308 8.87103 20 10.4177 20 12C20 14.1217 19.1572 16.1566 17.6569 17.6569C16.1566 19.1571 14.1217 20 12 20Z" /> </svg>Note</p> <div class="starlight-aside__content"> <p>When configuring WAF custom rules, do not match on this header. These rules are applied before Cloudflare adds the <code dir="auto">CF-Worker</code> header. Instead, use the <a href="https://developers-cloudflare-com.translate.goog/ruleset-engine/rules-language/fields/dynamic-fields/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#cfworkerupstream_zone"><code dir="auto">cf.worker.upstream_zone</code></a> dynamic field, which contains the same value and exists for the same purpose.</p> </div> </aside> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="connection">Connection</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#connection"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>For incoming requests, the value of this header will always be set to <code dir="auto">Keep-Alive</code>. If the client set a different value, such as <code dir="auto">close</code>, it will be overwritten. Note that is also the case when the client uses HTTP/2 or HTTP/3 to connect.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="considerations-for-spectrum">Considerations for Spectrum</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/fundamentals/reference/http-request-headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#considerations-for-spectrum"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>When using Spectrum with a TCP application, these headers are not visible at the origin as they are HTTP headers. 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