NixOS-Config/nixos/server/firewall.nix

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2024-08-24 22:16:51 -04:00
{
# Allow forwarding
boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
# Configure firewall
networking = let
ips = import ../common/ips.nix;
secrets = import ../common/secrets.nix;
in {
firewall = {
allowPing = false;
allowedTCPPorts = [
80 443 # Nginx
25565 19132 5657 # Pufferpanel
2299 # Gitea SSH
3478 5349 # Coturn
];
allowedTCPPortRanges = [
{ from = 8100; to = 8150; } # Azuracast
];
allowedUDPPorts = [
25565 19132 # Minecraft Voicechat and Bedrock
3478 5349 # Coturn UDP
];
allowedUDPPortRanges = [
{ from = 49000; to = 50000; } # Coturn range
];
# Add extra input rules using nftables
extraInputRules = ''
ip saddr ${ips.localSpan}.0/24 tcp dport 2049 accept comment "Accept NFS"
ip saddr ${ips.localSpan}.0/24 udp dport 53 accept comment "Accept DNS"
ip saddr { ${ips.pc}, ${secrets.lunaIP}, ${secrets.cornIP}, ${secrets.vertIP} } tcp dport { 1935, 1945 } accept comment "Accept RTMP"
'';
};
# 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 ${ips.pc}:22 comment "SSH to PC"
udp dport { 27005, 27015, 7777 } dnat to ${ips.pc} comment "Games to PC"
tcp dport { 58010, 57989, 57984 } dnat to ${ips.pc} comment "Sunshine TCP to PC"
udp dport { 57998, 57999, 58000 } dnat to ${ips.pc} comment "Sunshine UDP to PC"
tcp dport { 38010, 37989, 37984 } dnat to ${ips.vm} comment "Sunshine TCP to VM"
udp dport { 37998, 37999, 38000 } dnat to ${ips.vm} comment "Sunshine UDP to VM"
ip saddr ${secrets.cornIP} tcp dport { 9943, 9944 } dnat to ${ips.vm} comment "ALVR TCP to VM"
ip saddr ${secrets.cornIP} udp dport { 9943, 9944 } dnat to ${ips.vm} comment "ALVR UDP to VM"
}
chain POSTROUTING {
type nat hook postrouting priority 100; policy accept;
oifname "${ips.netInt}" masquerade
}
'';
};
};
};
};
}