hosts/losurdo/fail2ban.nix

   1 { pkgs, lib, config, hosts, ... }:
   2 {
   3 services.openssh.logLevel = "VERBOSE";
   4 services.postgresql.logLinePrefix = "%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     #"0.0.0.0/8"
  24     #"10.0.0.0/8"
  25     "127.0.0.0/8"
  26     #"169.254.0.0/16"
  27     #"172.16.0.0/12"
  28     #"192.0.2.0/24"
  29     "192.168.0.0/16"
  30     #"224.0.0.0/3"
  31     #"240.0.0.0/5"
  32     hosts.mermet.extraArgs.ipv4
  33     hosts.mermet.extraArgs.wireguard.wg-intra.ipv4
  34     "losurdo.sourcephile.fr"
  35     "vpn.riseup.net"
  36   ];
  37   jails = {
  38     DEFAULT = ''
  39     '';
  40     sshd = ''
  41       enabled = true
  42       bantime = 5m
  43       findtime = 1d
  44       maxretry = 1
  45       mode = aggressive
  46     '';
  47     postgresql = ''
  48       enabled = true
  49       bantime = 1m
  50       filter = postgresql
  51       findtime = 1d
  52       port = 5432
  53     '';
  54   };
  55 };
  56 environment.etc."fail2ban/action.d/nftables-common.local".text = ''
  57   [Init]
  58   blocktype = drop
  59 '';
  60 environment.etc."fail2ban/filter.d/postgresql.local".text = ''
  61   [INCLUDES]
  62   before = common.conf
  63   [DEFAULT]
  64   _daemon = postgresql-start
  65   [Definition]
  66   journalmatch = _SYSTEMD_UNIT=postgresql.service + _COMM=postgres
  67   prefregex = ^<F-MLFID>%(__prefix_line)s</F-MLFID><F-CONTENT>.+</F-CONTENT>$
  68   failregex = ^<HOST>\s+FATAL:\s*no pg_hba.conf entry for host.+$
  69               ^<HOST>\s+FATAL:\s*no PostgreSQL user name specified in startup packet.+$
  70               ^<HOST>\s+FATAL:\s*password authentication failed for user.+$
  71               ^<HOST>\s+FATAL:\s*unsupported frontend protocol.+$
  72   maxlines = 1
  73   #ignoreregex = duration:
  74 '';
  75 }