WAF on Azure Application Gateway bot protection overview - Azure Web Application Firewall

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aria-hidden="true"></span> </span><span class="contents-expand-title">Table of contents</span></button> </div> <div class="content "><h1 id="azure-web-application-firewall-on-azure-application-gateway-bot-protection-overview">Azure Web Application Firewall on Azure Application Gateway bot protection overview</h1><div class="display-flex justify-content-space-between align-items-center flex-wrap-wrap page-metadata-container"> <div class="margin-right-xxs"> <ul class="metadata page-metadata" data-bi-name="page info" lang="en-us" dir="ltr"><li>Article</li><li class="visibility-hidden-visual-diff"><time class="is-invisible" data-article-date aria-label="Article review date" datetime="2023-10-12T17:01:00Z" data-article-date-source="calculated">10/12/2023</time> </li><li class="contributors-holder display-none-print"> <button aria-label="View all contributors" class="contributors-button link-button" data-bi-name="contributors" title="View all contributors">4 contributors</button> </li></ul> </div> <div id="user-feedback" class="margin-block-xxs display-none-print" data-hide-on-archived> <button id="user-feedback-button" data-test-id="conceptual-feedback-button" class="button button-sm button-clear button-primary" type="button" data-bi-name="user-feedback-button" data-user-feedback-button > <span class="icon" aria-hidden="true"> <span class="docon docon-like"></span> </span> <span>Feedback</span> </button> </div></div><nav id="center-doc-outline" class="doc-outline is-hidden-desktop display-none-print margin-bottom-sm" data-bi-name="intopic toc" aria-label="In this article"> <h2 id="ms--in-this-article" class="title is-6 margin-block-xs">In this article</h2> </nav><p>Roughly 20% of all Internet traffic comes from bad bots. They do things like scraping, scanning, and looking for vulnerabilities in your web application. When these bots are stopped at the Web Application Firewall (WAF), they can鈥檛 attack you. They also can鈥檛 use up your resources and services, such as your backends and other underlying infrastructure.</p> <p>You can enable a managed bot protection rule set for your WAF to block or log requests from known malicious IP addresses. The IP addresses are sourced from the Microsoft Threat Intelligence feed. Intelligent Security Graph powers Microsoft threat intelligence and is used by multiple services including Microsoft Defender for Cloud.</p> <h2 id="use-with-owasp-rulesets">Use with OWASP rulesets</h2> <p>You can use the Bot Protection ruleset alongside any of the OWASP rulesets with the Application Gateway WAF v2 SKU. Only one OWASP ruleset can be used at any given time. The bot protection ruleset contains another rule that appears in its own ruleset. It's titled <strong>Microsoft_BotManagerRuleSet_1.1</strong>, and you can enable or disable it like the other OWASP rules.</p> <p><span class="mx-imgBorder"> <a href="../media/bot-protection-overview/bot-ruleset.png#lightbox" data-linktype="relative-path"> <img src="../media/bot-protection-overview/bot-ruleset.png" alt="Screenshot show bot protection ruleset." data-linktype="relative-path"> </a> </span> </p> <h2 id="ruleset-update">Ruleset update</h2> <p>The bot mitigation ruleset list of known bad IP addresses updates multiple times per day from the Microsoft Threat Intelligence feed to stay in sync with the bots. Your web applications are continuously protected even as the bot attack vectors change.</p> <h2 id="log-example">Log example</h2> <p>Here's an example log entry for bot protection:</p> <pre><code>{ "timeStamp": "0000-00-00T00:00:00+00:00", "resourceId": "appgw", "operationName": "ApplicationGatewayFirewall", "category": "ApplicationGatewayFirewallLog", "properties": { "instanceId": "vm1", "clientIp": "1.2.3.4", "requestUri": "/hello.php?arg1=aaaaaaabccc", "ruleSetType": "MicrosoftBotProtection", "message": "IPReputationTriggered", "action": "Blocked", "hostname": "example.com", "transactionId": "abc", "policyId": "waf policy 1", "policyScope": "Global", "policyScopeName": "Default Policy", "engine": "Azwaf" } } </code></pre> <h2 id="next-steps">Next steps</h2> <ul> <li><a href="bot-protection" data-linktype="relative-path">Configure bot protection for Web Application Firewall on Azure Application Gateway</a></li> </ul> </div><div id="ms--inline-notifications" class="margin-block-xs" 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