112 lines
4.4 KiB
Nix
112 lines
4.4 KiB
Nix
{
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lib,
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config,
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...
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}: let
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dataFolder = "/var/lib/fail2ban";
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dataFile = "fail2ban.sqlite3";
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in {
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options.host.fail2ban = {
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enable = lib.mkEnableOption "should fail 2 ban be enabled on this server";
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};
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config = lib.mkIf config.host.fail2ban.enable (lib.mkMerge [
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{
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services.fail2ban = {
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enable = true;
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maxretry = 5;
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ignoreIP = [
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# Whitelist local networks
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"10.0.0.0/8"
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"172.16.0.0/12"
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"192.168.0.0/16"
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];
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bantime = "24h"; # Ban IPs for one day on the first ban
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bantime-increment = {
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enable = true; # Enable increment of bantime after each violation
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formula = "ban.Time * math.exp(float(ban.Count+1)*banFactor)/math.exp(1*banFactor)";
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maxtime = "168h"; # Do not ban for more than 1 week
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overalljails = true; # Calculate the ban time based on all the violations
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};
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jails = {
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nginx-iptables.settings = lib.mkIf config.services.nginx.enable {
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filter = "nginx";
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action = ''iptables-multiport[name=HTTP, port="http,https"]'';
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backend = "auto";
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failregex = "limiting requests, excess:.* by zone.*client: <HOST>";
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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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jellyfin-iptables.settings = lib.mkIf config.services.jellyfin.enable {
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filter = "jellyfin";
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action = ''iptables-multiport[name=HTTP, port="http,https"]'';
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logpath = "${config.services.jellyfin.dataDir}/log/*.log";
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backend = "auto";
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failregex = "^.*Authentication request for .* has been denied \\\(IP: \"<ADDR>\"\\\)\\\.";
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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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nextcloud-iptables.settings = lib.mkIf config.services.nextcloud.enable {
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filter = "nextcloud";
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action = ''iptables-multiport[name=HTTP, port="http,https"]'';
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logpath = "${config.services.nextcloud.datadir}/*.log";
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backend = "auto";
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failregex = ''
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^{"reqId":".*","remoteAddr":".*","app":"core","message":"Login failed: '.*' \(Remote IP: '<HOST>'\)","level":2,"time":".*"}$
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^{"reqId":".*","level":2,"time":".*","remoteAddr":".*","user,:".*","app":"no app in context".*","method":".*","message":"Login failed: '.*' \(Remote IP: '<HOST>'\)".*}$
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^{"reqId":".*","level":2,"time":".*","remoteAddr":".*","user":".*","app":".*","method":".*","url":".*","message":"Login failed: .* \(Remote IP: <HOST>\).*}$
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'';
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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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forgejo-iptables.settings = lib.mkIf config.services.forgejo.enable {
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filter = "forgejo";
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action = ''iptables-multiport[name=HTTP, port="http,https"]'';
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logpath = "${config.services.forgejo.stateDir}/log/*.log";
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backend = "auto";
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failregex = ".*(Failed authentication attempt|invalid credentials|Attempted access of unknown user).* from <HOST>";
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findtime = 600;
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bantime = 600;
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maxretry = 5;
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};
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home-assistant-iptables.settings = lib.mkIf config.services.home-assistant.enable {
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filter = "home-assistant";
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action = ''iptables-multiport[name=HTTP, port="http,https"]'';
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logpath = "${config.services.home-assistant.configDir}/*.log";
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backend = "auto";
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failregex = "^%(__prefix_line)s.*Login attempt or request with invalid authentication from <HOST>.*$";
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findtime = 600;
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bantime = 600;
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maxretry = 5;
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};
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# TODO; figure out if there is any fail2ban things we can do on searx
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# searx-iptables.settings = lib.mkIf config.services.searx.enable {};
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};
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};
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}
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(lib.mkIf config.host.impermanence.enable {
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assertions = [
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{
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assertion = config.services.fail2ban.daemonSettings.Definition.dbfile == "${dataFolder}/${dataFile}";
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message = "fail2ban data file does not match persistence";
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}
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];
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environment.persistence."/persist/system/root" = {
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enable = true;
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hideMounts = true;
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directories = [
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{
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directory = dataFolder;
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user = "fail2ban";
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group = "fail2ban";
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}
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];
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};
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})
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]);
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}
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