94 lines
2.6 KiB
Nix
94 lines
2.6 KiB
Nix
{ cfg, lib, pkgs, ... }:
|
|
|
|
let
|
|
inherit (pkgs) writeScript writeText;
|
|
inherit (lib) concatMapStringsSep;
|
|
|
|
accept-new-tcp = port:
|
|
"-p tcp -m tcp --dport ${port} -m conntrack --ctstate NEW -j ACCEPT";
|
|
|
|
rules = iptables-version:
|
|
writeText "tv-iptables-rules${toString iptables-version}" ''
|
|
*nat
|
|
:PREROUTING ACCEPT [0:0]
|
|
:INPUT ACCEPT [0:0]
|
|
:OUTPUT ACCEPT [0:0]
|
|
:POSTROUTING ACCEPT [0:0]
|
|
${concatMapStringsSep "\n" (rule: "-A PREROUTING ${rule}") ([]
|
|
++ [
|
|
"! -i retiolum -p tcp -m tcp --dport 22 -j REDIRECT --to-ports 0"
|
|
"-p tcp -m tcp --dport 11423 -j REDIRECT --to-ports 22"
|
|
]
|
|
)}
|
|
COMMIT
|
|
*filter
|
|
:INPUT DROP [0:0]
|
|
:FORWARD DROP [0:0]
|
|
:OUTPUT ACCEPT [0:0]
|
|
:Retiolum - [0:0]
|
|
${concatMapStringsSep "\n" (rule: "-A INPUT ${rule}") ([]
|
|
++ [
|
|
"-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT"
|
|
"-i lo -j ACCEPT"
|
|
]
|
|
++ map accept-new-tcp cfg.input-internet-accept-new-tcp
|
|
++ ["-i retiolum -j Retiolum"]
|
|
)}
|
|
${concatMapStringsSep "\n" (rule: "-A Retiolum ${rule}") ([]
|
|
++ {
|
|
ip4tables = [
|
|
"-p icmp -m icmp --icmp-type echo-request -j ACCEPT"
|
|
];
|
|
ip6tables = [
|
|
"-p ipv6-icmp -m icmp6 --icmpv6-type echo-request -j ACCEPT"
|
|
];
|
|
}."ip${toString iptables-version}tables"
|
|
++ map accept-new-tcp cfg.input-retiolum-accept-new-tcp
|
|
++ {
|
|
ip4tables = [
|
|
"-p tcp -j REJECT --reject-with tcp-reset"
|
|
"-p udp -j REJECT --reject-with icmp-port-unreachable"
|
|
"-j REJECT --reject-with icmp-proto-unreachable"
|
|
];
|
|
ip6tables = [
|
|
"-p tcp -j REJECT --reject-with tcp-reset"
|
|
"-p udp -j REJECT --reject-with icmp6-port-unreachable"
|
|
"-j REJECT"
|
|
];
|
|
}."ip${toString iptables-version}tables"
|
|
)}
|
|
COMMIT
|
|
'';
|
|
|
|
startScript = writeScript "tv-iptables_start" ''
|
|
#! /bin/sh
|
|
set -euf
|
|
iptables-restore < ${rules 4}
|
|
ip6tables-restore < ${rules 6}
|
|
'';
|
|
in
|
|
|
|
{
|
|
networking.firewall.enable = false;
|
|
|
|
systemd.services.tv-iptables = {
|
|
description = "tv-iptables";
|
|
wantedBy = [ "network-pre.target" ];
|
|
before = [ "network-pre.target" ];
|
|
after = [ "systemd-modules-load.service" ];
|
|
|
|
path = with pkgs; [
|
|
iptables
|
|
];
|
|
|
|
restartIfChanged = true;
|
|
|
|
serviceConfig = {
|
|
Type = "simple";
|
|
RemainAfterExit = true;
|
|
Restart = "always";
|
|
ExecStart = "@${startScript} tv-iptables_start";
|
|
};
|
|
};
|
|
}
|