Add xinetd configs

nixos/hosts/osaka-vultr-01/xinetd.nix

@@ -1,9 +1,22 @@
 { config, lib, pkgs, ... }: {
- networking.firewall.allowedTCPPorts = [
-    80
-    443
-    8080
- ];
+  networking.firewall.allowedUDPPorts = [
+    3478  # Headscale DERP UDP
+    10000 # Jitsi
+  ];
+  networking.firewall.allowedTCPPorts = [
+    80    # HTTP
+    443   # HTTPS
+    25    # SMTP  (explicit TLS => STARTTLS)
+    465   # ESMTP (implicit TLS)
+    587   # ESMTP (explicit TLS => STARTTLS)
+    143   # IMAP4 (explicit TLS => STARTTLS)
+    993   # IMAP4 (implicit TLS)
+    4190  # Sieve support
+    42420 # Vintage Story
+    25565 # Minecraft
+    1443  # Headscale DERP
+    4443  # jitsi-jvb
+  ];
 
   services.xinetd = {
     enable = true;