machines/mermet/fail2ban.nix

   1 { pkgs, lib, config, machines, ... }:
   2 {
   3 services.openssh.logLevel = "VERBOSE";
   4 /*
   5 systemd.services.nftables.postStart = ''
   6   systemctl reload fail2ban
   7 '';
   8 */
   9 services.fail2ban = {
  10   enable = true;
  11   banaction = "nftables-multiport";
  12   banaction-allports = "nftables-allports";
  13   bantime-increment = {
  14     enable = true;
  15     factor = "1";
  16     formula = "ban.Time * (1 << min(ban.Count, 20)) * banFactor";
  17     maxtime = "1y";
  18     multipliers = "";
  19     overalljails = false;
  20     rndtime = "";
  21   };
  22   packageFirewall = pkgs.nftables;
  23   ignoreIP = [
  24     machines.mermet.extraArgs.ipv4
  25     machines.losurdo.extraArgs.ipv4
  26     "198.252.154.1" # wren.riseup.net
  27   ];
  28   jails = {
  29     DEFAULT = ''
  30     '';
  31     sshd = ''
  32       enabled = true
  33       bantime = 5m
  34       findtime = 1d
  35       maxretry = 1
  36       mode = aggressive
  37     '';
  38     postfix = ''
  39       enabled = true
  40       bantime = 5m
  41       findtime = 1d
  42       mode = aggressive
  43     '';
  44   };
  45 };
  46 environment.etc."fail2ban/action.d/nftables-common.local".text = ''
  47   [Init]
  48   blocktype = drop
  49 '';
  50 }