Anno 1800 Lan Multiplayer Fixed | Extended
Ensure both players are connected to the internet.
A surprisingly common cause of LAN connectivity failures is mismatched Windows operating system versions across the local network. One player running Windows 7 and another running Windows 8, for instance, has been documented as a scenario where hosting the game only worked from the newer operating system. Updating all devices to a common, recent version of Windows can eliminate these compatibility issues.
The notorious LR40 error indicates that the simulation state on one computer no longer matches the host computer. If the error occurs repeatedly after applying network fixes, the issue lies in corrupted cache files. Close Anno 1800 completely on all systems.
Turn your router off for 30 seconds and back on to refresh the connection. 4. Solving Late-Game Desync (LR40 Errors) anno 1800 lan multiplayer fixed
Press the Windows Key, type , and hit Enter. Locate the Synchronize your clock section in the menu.
Anno 1800 Multiplayer Fix: Resolving Connection & Desync Issues
On all PCs , add this to the game’s launch options in Ubisoft Connect / Steam: /noredirect /offline Ensure both players are connected to the internet
confirms the game will block connections if setups don't match. NAT Settings:
TCP: 80, 443, 13000, 13005, 13200, 14000, 14001, 14008, 14020, 14021, 14022, 14023 and 14024. Anno 1800: UDP: 18000 to 18010. Fix 5: Flush DNS and Reset Network Stack
Port forwarding is the process of telling your router to direct specific types of traffic to a particular device (your PC). For Anno 1800 , you need to forward the following ports for your PC's internal IP address: Updating all devices to a common, recent version
On every PC:
One quick diagnostic test is to temporarily connect one PC to your smartphone's mobile hotspot while leaving the other on your home network. If this resolves the issue, you've confirmed that the problem is related to how your router handles multiple connections with the same external IP.