60 lines
4.8 KiB
Nix
60 lines
4.8 KiB
Nix
{ pkgs, ... }: {
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# References:
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# https://blog.lrvt.de/configuring-fail2ban-with-traefik/
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# https://nixos.wiki/wiki/Fail2ban#Extending_Fail2ban
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services.logrotate = {
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enable = true;
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checkConfig = true;
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settings = {
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"/var/log/traefik/access.log" = {
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frequency = "daily";
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rotate = 30;
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};
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};
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};
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services.fail2ban.jails = {
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traefik-general-forceful-browsing = {
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settings = {
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enabled = true;
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filter = "traefik-general-forceful-browsing";
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action = "action-ban-docker-forceful-browsing";
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logpath = "/var/log/traefik/access.log";
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backend = "auto";
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findtime = 600;
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bantime = 600;
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maxretry = 5;
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};
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};
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};
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environment.etc= {
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"fail2ban/filter.d/traefik-general-forceful-browsing.conf".text = pkgs.lib.mkDefault (pkgs.lib.mkAfter ''
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[INCLUDES]
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[Definition]
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# fail regex based on traefik JSON access logs with enabled user agent logging
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failregex = ^{"ClientAddr":"<F-CLIENTADDR>.*</F-CLIENTADDR>","ClientHost":"<HOST>","ClientPort":"<F-CLIENTPORT>.*</F-CLIENTPORT>","ClientUsername":"<F-CLIENTUSERNAME>.*</F-CLIENTUSERNAME>","DownstreamContentSize":<F-DOWNSTREAMCONTENTSIZE>.*</F-DOWNSTREAMCONTENTSIZE>,"DownstreamStatus":<F-DOWNSTREAMSTATUS>.*</F-DOWNSTREAMSTATUS>,"Duration":<F-DURATION>.*</F-DURATION>,"OriginContentSize":<F-ORIGINCONTENTSIZE>.*</F-ORIGINCONTENTSIZE>,"OriginDuration":<F-ORIGINDURATION>.*</F-ORIGINDURATION>,"OriginStatus":(405|404|403|402|401),"Overhead":<F-OVERHEAD>.*</F-OVERHEAD>,"RequestAddr":"<F-REQUESTADDR>.*</F-REQUESTADDR>","RequestContentSize":<F-REQUESTCONTENTSIZE>.*</F-REQUESTCONTENTSIZE>,"RequestCount":<F-REQUESTCOUNT>.*</F-REQUESTCOUNT>,"RequestHost":"<F-CONTAINER>.*</F-CONTAINER>","RequestMethod":"<F-REQUESTMETHOD>.*</F-REQUESTMETHOD>","RequestPath":"<F-REQUESTPATH>.*</F-REQUESTPATH>","RequestPort":"<F-REQUESTPORT>.*</F-REQUESTPORT>","RequestProtocol":"<F-REQUESTPROTOCOL>.*</F-REQUESTPROTOCOL>","RequestScheme":"<F-REQUESTSCHEME>.*</F-REQUESTSCHEME>","RetryAttempts":<F-RETRYATTEMPTS>.*</F-RETRYATTEMPTS>,.*"StartLocal":"<F-STARTLOCAL>.*</F-STARTLOCAL>","StartUTC":"<F-STARTUTC>.*</F-STARTUTC>","TLSCipher":"<F-TLSCIPHER>.*</F-TLSCIPHER>","TLSVersion":"<F-TLSVERSION>.*</F-TLSVERSION>","entryPointName":"<F-ENTRYPOINTNAME>.*</F-ENTRYPOINTNAME>","level":"<F-LEVEL>.*</F-LEVEL>","msg":"<F-MSG>.*</F-MSG>",("request_User-Agent":"<F-USERAGENT>.*</F-USERAGENT>",){0,1}?"time":"<F-TIME>.*</F-TIME>"}$
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# custom date pattern for traefik JSON access logs
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# based on https://github.com/fail2ban/fail2ban/issues/2558#issuecomment-546738270
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datepattern = "StartLocal"\s*:\s*"%%Y-%%m-%%d[T]%%H:%%M:%%S\.%%f\d*(%%z)?",
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# ignore common errors like missing media files or JS/CSS/TXT/ICO stuff
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ignoreregex = ^{"ClientAddr":"<F-CLIENTADDR>.*</F-CLIENTADDR>","ClientHost":"<HOST>","ClientPort":"<F-CLIENTPORT>.*</F-CLIENTPORT>","ClientUsername":"<F-CLIENTUSERNAME>.*</F-CLIENTUSERNAME>","DownstreamContentSize":<F-DOWNSTREAMCONTENTSIZE>.*</F-DOWNSTREAMCONTENTSIZE>,"DownstreamStatus":<F-DOWNSTREAMSTATUS>.*</F-DOWNSTREAMSTATUS>,"Duration":<F-DURATION>.*</F-DURATION>,"OriginContentSize":<F-ORIGINCONTENTSIZE>.*</F-ORIGINCONTENTSIZE>,"OriginDuration":<F-ORIGINDURATION>.*</F-ORIGINDURATION>,"OriginStatus":(405|404|403|402|401),"Overhead":<F-OVERHEAD>.*</F-OVERHEAD>,"RequestAddr":"<F-REQUESTADDR>.*</F-REQUESTADDR>","RequestContentSize":<F-REQUESTCONTENTSIZE>.*</F-REQUESTCONTENTSIZE>,"RequestCount":<F-REQUESTCOUNT>.*</F-REQUESTCOUNT>,"RequestHost":"<F-REQUESTHOST>.*</F-REQUESTHOST>","RequestMethod":"<F-REQUESTMETHOD>.*</F-REQUESTMETHOD>","RequestPath":"<F-REQUESTPATH>.*(\.png|\.txt|\.jpg|\.ico|\.js|\.css|\.ttf|\.woff|\.woff2)(/)*?</F-REQUESTPATH>","RequestPort":"<F-REQUESTPORT>.*</F-REQUESTPORT>","RequestProtocol":"<F-REQUESTPROTOCOL>.*</F-REQUESTPROTOCOL>","RequestScheme":"<F-REQUESTSCHEME>.*</F-REQUESTSCHEME>","RetryAttempts":<F-RETRYATTEMPTS>.*</F-RETRYATTEMPTS>,.*"StartLocal":"<F-STARTLOCAL>.*</F-STARTLOCAL>","StartUTC":"<F-STARTUTC>.*</F-STARTUTC>","TLSCipher":"<F-TLSCIPHER>.*</F-TLSCIPHER>","TLSVersion":"<F-TLSVERSION>.*</F-TLSVERSION>","entryPointName":"<F-ENTRYPOINTNAME>.*</F-ENTRYPOINTNAME>","level":"<F-LEVEL>.*</F-LEVEL>","msg":"<F-MSG>.*</F-MSG>",("request_User-Agent":"<F-USERAGENT>.*</F-USERAGENT>",){0,1}?"time":"<F-TIME>.*</F-TIME>"}$
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'');
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"fail2ban/action.d/action-ban-docker-forceful-browsing.conf".text = pkgs.lib.mkDefault (pkgs.lib.mkAfter ''
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[Definition]
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actionban = ${pkgs.iptables}/bin/iptables -I DOCKER-USER -m string --algo bm --string 'X-Forwarded-For: <ip>' -j DROP
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${pkgs.iptables}/bin/iptables -A INPUT -s <ip> -j DROP
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actionunban = ${pkgs.iptables}/bin/iptables -D DOCKER-USER -m string --algo bm --string 'X-Forwarded-For: <ip>' -j DROP
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${pkgs.iptables}/bin/iptables -D INPUT -s <ip> -j DROP
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'');
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};
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}
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