Multiplayer Fixed [top] - Anno 1800 Lan

Before we explore fixes, it's essential to understand why LAN multiplayer in Anno 1800 isn't as straightforward as it was in earlier Anno titles. Anno 1800 routes all multiplayer connectivity through Ubisoft Connect servers, even when players are physically in the same building. As one forum user aptly summarized: "Man weiß, dass man dafür online sein muss und es nicht über Lan mit einem lokalen Netzwerk funktioniert" (you have to be online and it doesn't work over LAN with a local network).

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The co-op mode works regardless of which DLCs are installed, but if you want to use specific expansion content, all players must own it. This applies to major DLCs like Sunken Treasures, The Passage, and Land of Lions. anno 1800 lan multiplayer fixed

While no one at Ubisoft explicitly said "We added LAN," dataminers and network engineers quickly realized what had changed. The game’s reliance on the external relay for initial handshake was reduced. The game now prioritizes a on the local subnet.

If your internet goes down, you cannot technically launch a "multiplayer" match through the traditional method. Before we explore fixes, it's essential to understand

All players must have identical game data. Use the "Verify Files" tool in the Ubisoft Connect or Steam launcher to fix corrupted assets.

Ubisoft’s masterpiece of logistics and city-building is beloved by millions, but for those trying to play over a Local Area Network (LAN)—whether at a LAN party, between two PCs in the same house, or via VPN services like Hamachi or ZeroTier—the experience has historically been plagued with desync errors, connection drops, and the dreaded "Failed to join session" message. This public link is valid for 7 days

The modern Ubisoft infrastructure requires an active handshake with the online client even when PCs sit in the same room. When multiple computers share an external IP, the game engine struggles to route information to separate machines on identical local setups. This breakdown manifests through specific codes:

If you are looking for specific help with a certain type of error message, tell me: Are you seeing a "connection lost" message? Is your friend not showing up in the Ubisoft friends list? Are you using the Steam or Epic Games version?

80, 443, 14000, 14008, 14020, 14021, 14022, 14023 and 14024. UDP: