106 lines
3.3 KiB
Nix
106 lines
3.3 KiB
Nix
{
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lib,
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pkgs,
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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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environment.etc = {
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"fail2ban/filter.d/nginx.local".text = lib.mkIf config.services.nginx.enable (
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pkgs.lib.mkDefault (pkgs.lib.mkAfter ''
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[Definition]
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failregex = "limiting requests, excess:.* by zone.*client: <HOST>"
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'')
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);
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# "fail2ban/filter.d/hass.local".text = lib.mkIf config.services.home-assistant.enable (
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# pkgs.lib.mkDefault (pkgs.lib.mkAfter ''
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# [INCLUDES]
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# before = common.conf
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# [Definition]
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# failregex = ^%(__prefix_line)s.*Login attempt or request with invalid authentication from <HOST>.*$
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# ignoreregex =
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# [Init]
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# datepattern = ^%%Y-%%m-%%d %%H:%%M:%%S
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# '')
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# );
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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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# tail scale tailnet
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"100.64.0.0/10"
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"fd7a:115c:a1e0::/48"
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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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enabled = true;
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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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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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# enabled = true;
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# filter = "hass";
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# action = ''iptables-multiport[name=HTTP, port="http,https"]'';
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# logpath = "${config.services.home-assistant.configDir}/*.log";
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# backend = "auto";
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# findtime = 600;
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# bantime = 600;
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# maxretry = 5;
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# };
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# TODO; figure out if there is any fail2ban things we can do on searx
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# searx-iptables.settings = lib.mkIf config.services.searx.enable {};
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};
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};
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}
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(lib.mkIf config.host.impermanence.enable {
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assertions = [
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{
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assertion = config.services.fail2ban.daemonSettings.Definition.dbfile == "${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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