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fail2ban
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filter.d
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apache-auth.conf
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# Fail2Ban apache-auth filter # [INCLUDES] # Read common prefixes. If any customizations available -- read them from # apache-common.local before = apache-common.conf [Definition] # Mode for filter: normal (default) and aggressive (allows DDoS & brute force detection of mod_evasive) mode = normal # ignore messages of mod_evasive module: apache-pref-ign-normal = (?!evasive) # allow "denied by server configuration" from all modules: apache-pref-ign-aggressive = # mode related ignore prefix for common _apache_error_client substitution: apache-pref-ignore = <apache-pref-ign-<mode>> prefregex = ^%(_apache_error_client)s (?:AH\d+: )?<F-CONTENT>.+</F-CONTENT>$ # auth_type = ((?:Digest|Basic): )? auth_type = ([A-Z]\w+: )? failregex = ^client (?:denied by server configuration|used wrong authentication scheme)\b ^user (?!`)<F-USER>(?:\S*|.*?)</F-USER> (?:auth(?:oriz|entic)ation failure|not found|denied by provider)\b ^Authorization of user <F-USER>(?:\S*|.*?)</F-USER> to access .*? failed\b ^%(auth_type)suser <F-USER>(?:\S*|.*?)</F-USER>: password mismatch\b ^%(auth_type)suser `<F-USER>(?:[^']*|.*?)</F-USER>' in realm `.+' (auth(?:oriz|entic)ation failure|not found|denied by provider)\b ^%(auth_type)sinvalid nonce .* received - length is not\b ^%(auth_type)srealm mismatch - got `(?:[^']*|.*?)' but expected\b ^%(auth_type)sunknown algorithm `(?:[^']*|.*?)' received\b ^invalid qop `(?:[^']*|.*?)' received\b ^%(auth_type)sinvalid nonce .*? received - user attempted time travel\b ^(?:No h|H)ostname \S+ provided via SNI(?:, but no hostname provided| and hostname \S+ provided| for a name based virtual host)\b ignoreregex = # DEV Notes: # # This filter matches the authorization failures of Apache. It takes the log messages # from the modules in aaa that return HTTP_UNAUTHORIZED, HTTP_METHOD_NOT_ALLOWED or # HTTP_FORBIDDEN and not AUTH_GENERAL_ERROR or HTTP_INTERNAL_SERVER_ERROR. # # An unauthorized response 401 is the first step for a browser to instigate authentication # however apache doesn't log this as an error. Only subsequent errors are logged in the # error log. # # Source: # # By searching the code in http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/aaa/* # for ap_log_rerror(APLOG_MARK, APLOG_ERR and examining resulting return code should get # all of these expressions. Lots of submodules like mod_authz_* return back to mod_authz_core # to return the actual failure. # # Note that URI can contain spaces. # # See also: http://wiki.apache.org/httpd/ListOfErrors # Expressions that don't have tests and aren't common. # more be added with https://issues.apache.org/bugzilla/show_bug.cgi?id=55284 # ^user .*: nonce expired \([\d.]+ seconds old - max lifetime [\d.]+\) - sending new nonce\s*$ # ^user .*: one-time-nonce mismatch - sending new nonce\s*$ # ^realm mismatch - got `(?:[^']*|.*?)' but no realm specified\s*$ # # Because url/referer are foreign input, short form of regex used if long enough to idetify failure. # # Author: Cyril Jaquier # Major edits by Daniel Black and Ben Rubson. # Rewritten for v.0.10 by Sergey Brester (sebres).