NixOS-Config/system/server/firewall.nix
2024-09-23 16:22:01 -04:00

57 lines
2.4 KiB
Nix

{outputs, ...}: {
# Allow forwarding
boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
# Configure firewall
networking = let
mailPorts = "{ 25, 143, 465, 587, 993, 4190 }";
in {
firewall = {
allowPing = false;
# Add extra input rules using nftables
extraInputRules = ''
ip saddr { ${outputs.ips.localSpan}.0/24, ${outputs.ips.wgSpan}.0/24 } tcp dport 2049 accept comment "Accept NFS"
ip saddr { ${outputs.ips.pc}, ${outputs.secrets.lunaIP}, ${outputs.secrets.cornIP}, ${outputs.secrets.vertIP} } tcp dport { 1935, 1945 } accept comment "Accept RTMP"
ip saddr ${outputs.ips.wgSpan}.3 tcp dport ${mailPorts} accept comment "Accept mail"
'';
};
# Enable nftables and forwarding
nftables = {
enable = true;
tables = {
forwarding = {
family = "ip";
content = ''
chain PREROUTING {
type nat hook prerouting priority dstnat; policy accept;
tcp dport 2211 dnat to ${outputs.ips.pc}:22 comment "SSH to PC"
tcp dport 2233 dnat to ${outputs.ips.wgSpan}.3:22 comment "SSH to Oracle VM"
udp dport { 27005, 27015, 7777 } dnat to ${outputs.ips.pc} comment "PC Hosted Games"
tcp dport { 58010, 57989, 57984 } dnat to ${outputs.ips.pc} comment "PC Sunshine TCP"
udp dport { 57998, 57999, 58000 } dnat to ${outputs.ips.pc} comment "PC Sunshine UDP"
tcp dport { 38010, 37989, 37984 } dnat to ${outputs.ips.vm} comment "VM Sunshine TCP"
udp dport { 37998, 37999, 38000 } dnat to ${outputs.ips.vm} comment "VM Sunshine UDP"
udp dport { 7790, 7791, 7792 } dnat to ${outputs.ips.hx} comment "Deus Ex"
ip saddr ${outputs.secrets.cornIP} tcp dport { 9943, 9944 } dnat to ${outputs.ips.vm} comment "VM ALVR TCP"
ip saddr ${outputs.secrets.cornIP} udp dport { 9943, 9944 } dnat to ${outputs.ips.vm} comment "VM ALVR UDP"
}
chain POSTROUTING {
type nat hook postrouting priority 100; policy accept;
oifname "${outputs.ips.netInt}" masquerade
iifname "${outputs.ips.netInt}" oifname "${outputs.ips.wgInt}" masquerade comment "Traffic from public to WireGuard"
tcp dport ${mailPorts} oifname != "${outputs.ips.wgInt}" drop comment "Send mail"
}
'';
};
};
};
};
}