Apache Mod Security Rule Update Broken
Apache ModSecurity rules break after update when CRS version changes.
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Apache fixes
Published troubleshooting guides for apache issues.
Apache Mod Evasive Connection Dropped
Apache mod_evasive blocks legitimate traffic when thresholds are too low.
Apache Mod XSendFile Not Downloading
Apache mod_xsendfile does not serve files when XSendFilePath is wrong.
Apache Mod Sed Not Processing
Apache mod_sed does not process response when SedContentType is not set.
Apache Mod Substitute Not Replacing
Apache mod_substitute does not replace content when FilterProtocol is wrong.
Apache Mod Ext Filter Corrupting Output
Apache mod_ext_filter corrupts response when conversion chain is broken.
Apache Mod Ratelimit Not Limiting
Apache output rate limiting does not work when OutputFilter is wrong.
Apache Mod Balancer Manager Not Accessible
Apache balancer-manager is inaccessible when location block is misconfigured.
Apache Mod Proxy WS Upgrade Failed
Apache WebSocket proxying fails when Upgrade headers are not forwarded.
Apache Mod Lua Script Error
Apache mod_lua scripts fail when Lua path or function is misconfigured.
Apache Include RequiredNotFound Failed
Apache fails to start when IncludeOptional files are missing with RequiredNotFound.
Apache Listen Directive Ignored
Apache does not bind to expected ports when Listen is in wrong context.
Apache IP Based VHost Conflict
Apache IP-based virtual hosts conflict when listening on same address.
Apache Name Based VHost Not Matching
Apache name-based virtual hosts do not match when ServerName is wrong.
Apache VirtualHost Default Wrong
Apache serves content from wrong VirtualHost when default is not first.
Apache Suexec Wrapper Error
Apache suexec fails when wrapper script permissions or ownership are wrong.
Apache Mod PHP Handler Not Working
Apache mod_php does not process PHP files when handler is misconfigured.
Apache Python WSGI Application Error
Apache mod_wsgi applications fail when Python path or virtualenv is wrong.
Apache Perl CGI Not Loading
Apache mod_perl scripts fail when interpreter is not initialized.
Apache CGI Script Permission Denied
Apache CGI scripts fail with permission denied when ExecCGI is not enabled.
Apache Mod Info Security Exposure
Apache mod_info exposes sensitive configuration when not restricted.
Apache Mod Status Incorrect Stats
Apache mod_status shows wrong statistics when ExtendedStatus is disabled.
Apache Deflate Compression Level
Apache mod_deflate compression is ineffective when level is misconfigured.
Apache Mod Headers Add Not Working
Apache mod_headers Header add directive does not work in wrong context.
Apache Mod Expires Not Setting Headers
Apache mod_expires does not set Cache-Control when ExpiresActive is off.
Apache AddType Mime Type Wrong
Apache serves wrong content type when AddType is misconfigured.
Apache AddHandler Multiple Extensions
Apache AddHandler causes unexpected behavior with multiple file extensions.
Apache Error Document Not Serving
Apache custom error pages are not served when paths are incorrect.
Apache Piped Logging Broken
Apache piped logs fail when rotatelogs or external program cannot be executed.
Apache Custom Log Format Not Working
Apache custom log format shows literal strings when quotes are misplaced.
Apache Logrotate Not Rotating
Apache logs are not rotated when logrotate configuration is incorrect.
Apache Timeout Waiting for Output
Apache request times out when backend does not send response within Timeout.
Apache MPM Prefork Memory Exhaustion
Apache prefork MPM consumes all memory when MaxRequestWorkers is too high.
Apache JK Mod AJP13 Protocol Error
Apache mod_jk AJP protocol fails when Tomcat connector is misconfigured.
Apache Mod Auth OpenIDC Callback Error
Apache OpenIDC authentication fails when redirect URI is misconfigured.
Apache LDAP Connection Timeout
Apache LDAP authentication times out when server is unreachable.
Apache Mod DAV SVN Authentication Failed
Apache SVN authentication fails when htpasswd file is misconfigured.
Apache DAV Lock Not Working
Apache WebDAV locking fails when DAVLockDB path is not writable.
Apache FCGID Process Exit Timeout
Apache mod_fcgid kills processes when FcgidIOTimeout is exceeded.
Apache CGID Socket Not Created
Apache mod_cgid cannot create CGI socket when permissions are incorrect.
Apache Mod Proxy Balancer Offline
Apache proxy balancer marks members offline when health checks fail.
Apache Proxy AJP Connection Failed
Apache mod_proxy_ajp cannot connect to Tomcat when AJP connector is down.
Apache Mod Rewrite Loop
Apache mod_rewrite causes redirect loop when rules are not properly anchored.
Apache Htaccess Override Not Working
Apache .htaccess directives are ignored when AllowOverride is set to None.
Apache MPM Worker Process Crash
Apache MPM worker processes crash when MaxRequestWorkers is exceeded.
Apache ModSecurity False Positive
Apache ModSecurity blocks legitimate requests when WAF rules are too strict.
Apache SSL Certificate Not Found
Apache SSL fails to start when certificate or key file paths are incorrect.
Apache 403 Forbidden Access
Apache returns 403 when Require directives deny access or DirectoryIndex is missing.
Apache 500 Internal Server Error
Apache returns 500 error when .htaccess has invalid directives or permissions are wrong.
Apache HTTPD Not Starting
Apache HTTPD fails to start due to port conflicts, syntax errors, or missing modules.