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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.postfwd;
in {
options = {
services.postfwd = with types; {
enable = mkEnableOption "postfwd3 - postfix firewall daemon";
rules = mkOption {
type = lines;
default = "";
description = "Rules";
};
};
};
config = mkIf cfg.enable {
systemd.services.postfwd = {
description = "postfwd3 - postfix firewall daemon";
wantedBy = ["multi-user.target"];
before = ["postfix.service"];
serviceConfig = {
Type = "forking";
ExecStart = "${pkgs.postfwd}/bin/postfwd3 ${escapeShellArgs [
"-vv"
"--daemon" "--user" "postfwd" "--group" "postfwd"
"--pidfile" "/run/postfwd3/postfwd3.pid"
"--proto" "unix"
"--port" "/run/postfwd3/postfwd3.sock"
"--save_rates" "/var/lib/postfwd/rates"
"--save_groups" "/var/lib/postfwd/groups"
"--summary" "3600"
"--cache" "600"
"--cache_proto" "unix"
"--cache_port" "/run/postfwd3/cache.sock"
"--file" (pkgs.writeText "postfwd3-rules" cfg.rules)
]}";
PIDFile = "/run/postfwd3/postfwd3.pid";
Restart = "always";
RestartSec = 5;
TimeoutSec = 10;
RuntimeDirectory = ["postfwd3"];
StateDirectory = ["postfwd"];
DynamicUser = true;
ProtectSystem = "strict";
ProtectHome = true;
SystemCallFilter = ["@system-service" "~@resources @obsolete"];
NoNewPrivileges = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectKernelLogs = true;
ProtectControlGroups = true;
MemoryDenyWriteExecute = true;
RestrictSUIDSGID = true;
KeyringMode = "private";
ProtectClock = true;
RestrictRealtime = true;
PrivateDevices = true;
PrivateTmp = true;
ProtectHostname = true;
RestrictNamespaces = true;
CapabilityBoundingSet = "";
RestrictAddressFamilies = ["AF_UNIX"];
PrivateNetwork = true;
PrivateUsers = true;
SystemCallArchitectures = "native";
LockPersonality = true;
ProtectProc = "invisible";
ProcSubset = "pid";
DevicePolicy = "closed";
IPAddressDeny = "any";
};
};
};
}
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