diff options
Diffstat (limited to 'nixos/modules/services/networking/nat.nix')
-rw-r--r-- | nixos/modules/services/networking/nat.nix | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/nixos/modules/services/networking/nat.nix b/nixos/modules/services/networking/nat.nix index da3827c35e63..89d8590093dd 100644 --- a/nixos/modules/services/networking/nat.nix +++ b/nixos/modules/services/networking/nat.nix @@ -38,19 +38,19 @@ let # NAT the marked packets. ${optionalString (cfg.internalInterfaces != []) '' iptables -w -t nat -A nixos-nat-post -m mark --mark 1 \ - -o ${cfg.externalInterface} ${dest} + ${optionalString (cfg.externalInterface != null) "-o ${cfg.externalInterface}"} ${dest} ''} # NAT packets coming from the internal IPs. ${concatMapStrings (range: '' iptables -w -t nat -A nixos-nat-post \ - -s '${range}' -o ${cfg.externalInterface} ${dest} + -s '${range}' ${optionalString (cfg.externalInterface != null) "-o ${cfg.externalInterface}"} ${dest} '') cfg.internalIPs} # NAT from external ports to internal ports. ${concatMapStrings (fwd: '' iptables -w -t nat -A nixos-nat-pre \ - -i ${cfg.externalInterface} -p ${fwd.proto} \ + -i ${toString cfg.externalInterface} -p ${fwd.proto} \ --dport ${builtins.toString fwd.sourcePort} \ -j DNAT --to-destination ${fwd.destination} @@ -81,7 +81,7 @@ let ${optionalString (cfg.dmzHost != null) '' iptables -w -t nat -A nixos-nat-pre \ - -i ${cfg.externalInterface} -j DNAT \ + -i ${toString cfg.externalInterface} -j DNAT \ --to-destination ${cfg.dmzHost} ''} @@ -134,7 +134,8 @@ in }; networking.nat.externalInterface = mkOption { - type = types.str; + type = types.nullOr types.str; + default = null; example = "eth1"; description = '' @@ -236,6 +237,15 @@ in { networking.firewall.extraCommands = mkBefore flushNat; } (mkIf config.networking.nat.enable { + assertions = [ + { assertion = (cfg.dmzHost != null) -> (cfg.externalInterface != null); + message = "networking.nat.dmzHost requires networking.nat.externalInterface"; + } + { assertion = (cfg.forwardPorts != []) -> (cfg.externalInterface != null); + message = "networking.nat.forwardPorts requires networking.nat.externalInterface"; + } + ]; + environment.systemPackages = [ pkgs.iptables ]; boot = { |