machines/losurdo/fail2ban.nix

   1 { pkgs, lib, config, machines, ... }:
   2 {
   3 services.openssh.logLevel = "VERBOSE";
   4 services.postgresql.settings.log_line_prefix = "%h ";
   5 /*
   6 systemd.services.nftables.postStart = '' systemctl reload fail2ban '';
   7 */
   8 services.fail2ban = {
   9   enable = true;
  10   banaction = "nftables-multiport";
  11   banaction-allports = "nftables-allports";
  12   bantime-increment = {
  13     enable = true;
  14     factor = "1";
  15     formula = "ban.Time * (1 << min(ban.Count, 20)) * banFactor";
  16     maxtime = "1y";
  17     multipliers = "";
  18     overalljails = false;
  19     rndtime = "";
  20   };
  21   packageFirewall = pkgs.nftables;
  22   ignoreIP = [
  23     machines.mermet.extraArgs.ipv4
  24     machines.mermet.extraArgs.wireguard.wg-intra.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     postgresql = ''
  39       enabled = true
  40       bantime = 1m
  41       filter = postgresql
  42       findtime = 1d
  43       port = 5432
  44     '';
  45   };
  46 };
  47 environment.etc."fail2ban/action.d/nftables-common.local".text = ''
  48   [Init]
  49   blocktype = drop
  50 '';
  51 environment.etc."fail2ban/filter.d/postgresql.local".text = ''
  52   [INCLUDES]
  53   before = common.conf
  54   [DEFAULT]
  55   _daemon = postgresql-start
  56   [Definition]
  57   journalmatch = _SYSTEMD_UNIT=postgresql.service + _COMM=postgres
  58   prefregex = ^<F-MLFID>%(__prefix_line)s</F-MLFID><F-CONTENT>.+</F-CONTENT>$
  59   failregex = ^<HOST>\s+FATAL:\s*no pg_hba.conf entry for host.+$
  60               ^<HOST>\s+FATAL:\s*no PostgreSQL user name specified in startup packet.+$
  61               ^<HOST>\s+FATAL:\s*password authentication failed for user.+$
  62               ^<HOST>\s+FATAL:\s*unsupported frontend protocol.+$
  63   maxlines = 1
  64   #ignoreregex = duration:
  65 '';
  66 }