haccfiles/parsons/nftables.nix

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{ config, lib, pkgs, ... }:
{
networking.firewall.enable = false;
networking.nat.enable = false;
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boot = {
kernelModules = [ "nf_nat_ftp" ];
kernel.sysctl = {
"net.ipv4.conf.all.forwarding" = true;
"net.ipv4.conf.default.forwarding" = true;
};
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};
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networking.nftables = {
enable = true;
ruleset = ''
table inet filter {
chain input {
type filter hook input priority filter
policy drop
icmpv6 type {
echo-request,
echo-reply,
mld-listener-query,
mld-listener-report,
mld-listener-done,
nd-router-advert,
nd-neighbor-solicit,
nd-neighbor-advert,
packet-too-big
} accept
icmp type echo-request accept
ct state invalid drop
ct state established,related accept
iifname { lo } accept
tcp dport { 25, 80, 443, 465, 587, 993, 4190, 62954, 64738 } accept
udp dport { 60000-61000, 64738 } accept
# DHCPv6
ip6 daddr fe80::/64 udp dport 546 accept
counter
}
chain output {
type filter hook output priority filter
policy accept
counter
}
chain forward {
type filter hook forward priority filter
policy accept
counter
}
}
table ip nat {
chain prerouting {
type nat hook prerouting priority -100
iifname enp35s0 tcp dport { 22 } dnat ${config.containers.forgejo.localAddress}:22
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}
chain postrouting {
type nat hook postrouting priority 100
iifname lxcbr0 oifname enp35s0 masquerade
iifname ve-* oifname enp35s0 masquerade
}
}
'';
};
}