hosts/losurdo/fail2ban.nix

   1 { pkgs, hosts, ... }:
   2 {
   3   services.openssh.settings.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       overalljails = false;
  18       rndtime = "";
  19     };
  20     packageFirewall = pkgs.nftables;
  21     ignoreIP = [
  22       #"0.0.0.0/8"
  23       #"10.0.0.0/8"
  24       "127.0.0.0/8"
  25       #"169.254.0.0/16"
  26       #"172.16.0.0/12"
  27       #"192.0.2.0/24"
  28       "192.168.0.0/16"
  29       #"224.0.0.0/3"
  30       #"240.0.0.0/5"
  31       hosts.mermet._module.args.ipv4
  32       "losurdo.sourcephile.fr"
  33     ];
  34     jails = {
  35       sshd.settings = {
  36         enabled = true;
  37         bantime = "5m";
  38         findtime = "1d";
  39         maxretry = "1";
  40         mode = "aggressive";
  41       };
  42       postgresql.settings = {
  43         enabled = true;
  44         bantime = "1m";
  45         filter = "postgresql";
  46         findtime = "1d";
  47         port = 5432;
  48       };
  49     };
  50   };
  51   environment.etc."fail2ban/action.d/nftables-common.local".text = ''
  52     [Init]
  53     blocktype = drop
  54   '';
  55   environment.etc."fail2ban/filter.d/postgresql.local".text = ''
  56     [INCLUDES]
  57     before = common.conf
  58     [DEFAULT]
  59     _daemon = postgresql-start
  60     [Definition]
  61     journalmatch = _SYSTEMD_UNIT=postgresql.service + _COMM=postgres
  62     prefregex = ^<F-MLFID>%(__prefix_line)s</F-MLFID><F-CONTENT>.+</F-CONTENT>$
  63     failregex = ^<HOST>\s+FATAL:\s*no pg_hba.conf entry for host.+$
  64                 ^<HOST>\s+FATAL:\s*no PostgreSQL user name specified in startup packet.+$
  65                 ^<HOST>\s+FATAL:\s*password authentication failed for user.+$
  66                 ^<HOST>\s+FATAL:\s*unsupported frontend protocol.+$
  67     maxlines = 1
  68     #ignoreregex = duration:
  69   '';
  70 }