Have all players lower their settings to match the person with the weakest PC.
I searched for a report or guide titled , but as of now, there is no official or widely recognized document with that exact name from Ubisoft or major gaming outlets.
Highly customizable; works across multiple operating systems. Requires a slightly technical setup web dashboard. Complex or cross-routed home networks. Well-known; simple user interface.
does not have a dedicated "Offline LAN" button, you can effectively play in a LAN environment by ensuring all players are on the same local network and using specific workarounds to bypass common connectivity bugs. anno 1800 lan multiplayer fixed
The following ports should be open on your router:
Save the changes and restart your router to apply the new rules. 2. Standardize IPv4 and Disable IPv6
Ensure all players joining your local session execute this step simultaneously. 4. Create Windows Defender Firewall Exceptions Have all players lower their settings to match
If you are looking to get , this guide will walk you through the most effective solutions, addressing common connectivity issues and desync errors as of 2026. The Challenge: Why Anno 1800 Lacks True LAN
Anno 1800 requires specific ports to be open to allow seamless data synchronization between the host machine and the players. Access your router's gateway settings and forward the following ports for the PC hosting the game:
Anno 1800 does not have a dedicated "LAN Mode" button in the main menu. The game requires an internet connection to connect to Ubisoft servers, even when players are sitting in the same room. The matchmaking relies on NAT types and external server handshakes, which can fail, leading to: errors. "Game Lobby Full" or lobby not appearing. Heavy desync (LR40) in later stages of the game. Requires a slightly technical setup web dashboard
While there is no dedicated LAN button to click, the game is designed to handle local P2P play. By following this guide, you can transform a frustrating string of error codes into stable, enjoyable multiplayer sessions with friends. If all else fails, the official Ubisoft Support Help Center remains an invaluable resource and the best place to report persistent bugs for future patches.
Assigning static IP addresses to each computer on the local network ensures that port forwarding rules remain reliable and minimizes network discovery time. To do this, configure your router's DHCP reservation settings or manually set a unique IP address for each computer within the local subnet.
If your friends get stuck loading at 60% or get "Failed to Join Game" errors:
Mastering Anno 1800 LAN Multiplayer: The Ultimate Fix and Setup Guide
