Upd | Company Of Heroes 2 Lan

Official versions of Company of Heroes 2 (CoH2) do not natively support LAN (Local Area Network) play. Multiplayer functionality is tied to Steam and Relic's online servers.

Part 6: Troubleshooting Specific Error Messages

| Error Message You See | What It Actually Means | The Fix | | :--- | :--- | :--- | | "UPD Connection Failed" | UDP port 27015 is blocked by Windows or router. | Run the "Allow UDP" script in Part 3, Step 2. | | "Host Migration in Progress" | Steam Relay lost connection to Relic. | Host must disable "Steam Networking" in Steam settings. | | "Version Mismatch (LAN UPD)" | One PC has a different CoH2.sga archive. | Verify integrity of game files on all PCs simultaneously. | | "Cannot find session" | Windows Network Discovery is off. | Turn on "Function Discovery Resource Publication" service on all PCs. | company of heroes 2 lan upd

1. Launch CoH2 via Steam (Internet required for handshake).
2. Go to Multiplayer > Custom Game.
3. Look at the bottom right of the chat lobby. There should be a button that says "LAN" (next to "Automatch").
4. Note: If this button is greyed out, you need to disconnect your Ethernet/WiFi after launching the game (a risky trick that often desyncs).

Step 3: Router Configuration (For True LAN Parties)

If all PCs are on the same switch, this may not be needed. But if using a router: Official versions of Company of Heroes 2 (CoH2)

6. The Larger Lesson

CoH2 shows the tension between developer control and player ownership. LAN isn’t a technical limitation – it’s a business policy. And the community’s ingenuity proved that where there’s a will (and a packet sniffer), there’s a way. Launch CoH2 via Steam (Internet required for handshake)