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Networking & Port Forwarding

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Jason edited this page Aug 9, 2026 · 1 revision

🌐 Networking & Port Forwarding

Getting your server visible to the outside world is a critical step in server hosting. Synix includes built-in diagnostic tools and safeguards to make this process as transparent as possible.

🔍 Local Link vs WAN Link Diagnostic

Synix utilizes a two-tier network diagnostic check shown on the dashboard:

  • LOCAL LINK [ONLINE / OFFLINE]: Probes your local adapter IP and process listener status. If ONLINE, your local process is running and Windows Firewall is allowing local traffic.
  • WAN LINK [ONLINE / HIDDEN]: Probes your Public IP address over NAT. If HIDDEN, external players cannot find your server in the public browser list. Check router port forwarding.

🛣️ Port Forwarding Master Guide

To make your server accessible on the internet, forward the required ports on your home router:

  1. Find your LAN IP: Determine your LAN IP (e.g., 192.168.1.50) from the bottom status bar in Synix.
  2. Find your Router IP (Default Gateway): Open Windows Command Prompt (cmd), type ipconfig, and press Enter. Look for the Default Gateway address (typically 192.168.1.1 or 10.0.0.1).
  3. Access your Router: Type that Default Gateway IP into your web browser's address bar to open your router's admin panel.
  4. Add Port Rules: Add Port Forwarding Rules pointing to your LAN IP:
    • Game Port: -> UDP
    • Query Port: -> UDP
    • RCON / App Port: -> TCP
  5. Verify: Save router settings and re-run the WAN diagnostic test in Synix.

🪃 NAT Hairpinning & Joining Your Own Server

Symptom: Your friends can join via your Public IP, but you may get 'Connection Timeout' when trying to use your own Public IP.

CAUSE: Most home routers lack 'NAT Loopback/Hairpinning' support and block internal devices from routing back into their own public WAN interface.

SOLUTION: Connect to your server using your local LAN IP (e.g., 192.168.x.x) or loopback address (127.0.0.1). External players must continue to use your Public IP.

📋 Steam Master Server Query Rules

Steam indexes game servers via A2S_INFO query protocols sent to the Query Port.

  • Standard Query Ports: 27015, 27016, 27017 are preferred defaults.
  • Delay on First Boot: It can take 5 to 15 minutes for Steam's Master Server indexers to broadcast a newly created server globally.
  • Query Port Clashes: Ensure no two servers on your local network share the same Query Port.

🛡️ Synix Network Guard

Network Guard continuously monitors global bandwidth across your network adapter.

  • Surge Monitoring: Detects extreme packet/bandwidth floods that exceed regular gameplay.
  • False-Positive Suppression: Automatically suppresses network flood warnings when active SteamCMD downloads or game updates are detected.
  • Alert Overlay: Displays visual desktop notifications if network saturation occurs while you are tabbed out.

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