servers/mermet/fail2ban.nix

   1 { pkgs, lib, config, servers, ... }:
   2 {
   3 services.sshd.logLevel = "VERBOSE";
   4 services.fail2ban = {
   5   enable = true;
   6   banaction = "nftables-multiport";
   7   banaction-allports = "nftables-allports";
   8   bantime-increment = {
   9     enable = true;
  10     factor = "1";
  11     formula = "ban.Time * (1 << min(ban.Count, 20)) * banFactor";
  12     maxtime = "1y";
  13     multipliers = "";
  14     overalljails = false;
  15     rndtime = "";
  16   };
  17   packageFirewall = pkgs.nftables;
  18   ignoreIP = [
  19     servers.mermet.ipv4
  20     servers.losurdo.ipv4
  21     "198.252.154.1" # wren.riseup.net
  22   ];
  23   jails = {
  24     DEFAULT = ''
  25     '';
  26     sshd = ''
  27       enabled = true
  28       bantime = 5m
  29       findtime = 1d
  30       maxretry = 1
  31       mode = aggressive
  32     '';
  33     postfix = ''
  34       enabled = true
  35       bantime = 5m
  36       findtime = 1d
  37       mode = aggressive
  38     '';
  39   };
  40 };
  41 environment.etc."fail2ban/action.d/nftables-common.local".text = ''
  42   [Init]
  43   blocktype = drop
  44 '';
  45 }