These less common errors generally relate to network configuration issues. The Ubisoft support team recommends following their comprehensive connection troubleshooting guide, which includes steps for port forwarding and firewall configuration.
Because multiple computers in the same household share a single public IP address, your router’s Network Address Translation (NAT) table can become confused when routing incoming game data to different machines. Windows Defender Firewall Setup
Are you connecting via a , or are you using a virtual LAN software like Radmin or Hamachi?
Desyncs happen when one player’s game state stops matching the others. This often triggers an "LR40" error. anno 1800 lan multiplayer fixed
: Manually forward UDP Port 18000 in your router to your PC’s local IP address. Note that routers typically only allow forwarding a specific port to one device, which can cause issues if multiple people are on the same local network. Resolving Desyncs (LR40 Error)
If you need, I can based on the most upvoted fixes from those sources. Would that be helpful?
The short answer is mostly yes , but with specific caveats. Following the final major updates (Game Update 17 and 18) and the end of major DLC support, Ubisoft quietly patched several core networking issues. However, the game still does not have a "Classic LAN" mode. Instead, we have a functional workaround that feels like LAN. These less common errors generally relate to network
Despite the lack of a true LAN toggle, Anno 1800 allows up to 16 players in a single session, with up to four players per faction in co-op mode. This makes it ideal for local multiplayer events. Follow these steps to set up a stable local game.
As one grateful forum member recently wrote after finally getting their setup working: "Yay, 10000 Dank! Jetzt klappt das pingen auf beiden Seiten... Du bist unser Held! Jahrelang probiert und nichts hat geholfen" (Yay, many thanks! Now pinging works on both sides... You're our hero! Years of trying and nothing helped until now).
ipconfig /release ipconfig /renew ipconfig /flushdns netsh int ip reset netsh winsock reset Use code with caution. Restart your computer immediately. 5. Force IPv4 Protocol over IPv6 Windows Defender Firewall Setup Are you connecting via
This caused three specific failures:
This performs a series of network resets found in various community fixes.
From the main menu, select → "Host New Game" . Set your game parameters, then invite your friends from within the lobby by clicking the plus sign (+) under your avatar.
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