Finally switch to flakes.

nixos/server/firewall.nix

@@ -0,0 +1,67 @@
+{
+  # 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
+            }
+          '';
+        };
+      };
+    };
+  };
+}