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:
Forget what the game tells you. Do not use "Internet Game."
"Zero lag," Marcus confirmed. "The connection is solid. We are officially industrialized."
include network instability, background applications, and differences in game data across devices.
While players without certain DLCs can join a host who owns them, the game will automatically disable those DLCs for the session. Ensure your base game configurations match to prevent loading crashes. Fix 1: Configure Windows Defender Firewall anno 1800 lan multiplayer fixed
Ensure both and Public checkboxes are ticked for both applications. Click OK and restart your computer. 4. Clear the Ubisoft Connect Cache
: Check your router settings to ensure UPnP is enabled, as this helps the game manage port forwarding automatically for peer-to-peer sessions. Troubleshooting Common Errors
Then, the sounds of industry washed over them. The clang of hammers, the hiss of steam pipes, the cheerful cries of the populace. Elena’s camera panned over Crown Falls, the jewel of their empire. The smokestacks were pumping out white plumes, the market squares were bustling, and the trading vessels were sailing smoothly across the bay without a single stutter.
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: Anno 1800 requires specific ports to be open
If you're unable to join friends or keep getting "LR40" desync errors, follow these steps: Verify Game Files: Ensure everyone is on the exact same version via Ubisoft Connect Sync Your Mods: If using mods, every player must have the exact same mod folders and versions installed. The Anno Union
Right-click the Windows Start button and open or Command Prompt (Admin) .
A major update was released to resolve severe desync issues on PC. This fix stabilized sessions that previously crashed every few hours.
Anno 1800 uses specific ports to maintain a stable heartbeat between players. Forward these on your router: : 18000, 18017 2. The "Invite Only" Workaround If the "Public" lobby isn't working: Start a game in Shift + F2 to open the Ubisoft Overlay. friends from your list. 3. Clear Ubisoft Cache "The connection is solid
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Many "LAN" issues are actually handshake failures between Steam and Ubisoft Connect.
Under the tab, click Settings within the Performance block.
Anno 1800 requires specific network ports to be wide open to communicate effectively between local machines and Ubisoft servers. Log into your network router gateway via your web browser. Navigate to the or NAT settings tab.