65 lines
1.7 KiB
Nix
65 lines
1.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.ferm;
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configFile = pkgs.stdenv.mkDerivation {
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name = "ferm.conf";
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text = cfg.config;
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preferLocalBuild = true;
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buildCommand = ''
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echo -n "$text" > $out
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${cfg.package}/bin/ferm --noexec $out
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'';
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};
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in {
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options = {
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services.ferm = {
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enable = mkOption {
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default = false;
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example = true;
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type = types.bool;
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description = ''
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Whether to enable Ferm Firewall.
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*Warning*: Enabling this service WILL disable the existing NixOS
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firewall! Default firewall rules provided by packages are not
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considered at the moment.
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'';
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};
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config = mkOption {
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description = "Verbatim ferm.conf configuration.";
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default = "";
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defaultText = "empty firewall, allows any traffic";
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type = types.lines;
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};
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package = mkOption {
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description = "The ferm package.";
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type = types.package;
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default = pkgs.ferm;
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defaultText = "pkgs.ferm";
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};
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};
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};
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config = mkIf cfg.enable {
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systemd.services.firewall.enable = false;
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systemd.services.ferm = {
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description = "Ferm Firewall";
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after = [ "ipset.target" ];
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before = [ "network-pre.target" ];
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wants = [ "network-pre.target" ];
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wantedBy = [ "multi-user.target" ];
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reloadIfChanged = true;
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serviceConfig = {
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Type="oneshot";
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RemainAfterExit = "yes";
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ExecStart = "${cfg.package}/bin/ferm ${configFile}";
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ExecReload = "${cfg.package}/bin/ferm ${configFile}";
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ExecStop = "${cfg.package}/bin/ferm -F ${configFile}";
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};
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};
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};
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}
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