Anno 1800 Lan Multiplayer Fixed -

Ensure all players are utilizing the same API. If one player uses DirectX 11 and another uses DirectX 12, desync frequencies increase dramatically. Switching everyone to DirectX 11 offers the highest stability for multiplayer. Clear the Game Cache

Quit to the main menu and host a multiplayer lobby using this new save file.

The host should load the save alone in a single-player session.

Disable (also known as Client Isolation or Access Point Isolation), which explicitly blocks local wireless devices from talking directly to one another. anno 1800 lan multiplayer fixed

Ensure only your primary physical interface (Ethernet or Wi-Fi) remains active. Enforce IPV4 Priority

: For the most stable connection, ensure your NAT type is Open . Forward UDP Port 18000 in your router settings to the hosting PC.

If you want to play a simulated LAN setup over the internet with friends, third-party VPN tools can bridge the gap. Programs like Radmin VPN or ZeroTier create a secure virtual switch that mimics a physical local network. Radmin VPN Configuration Ensure all players are utilizing the same API

If you want to troubleshoot a specific multiplayer error code, let me know:

: Many players find that disabling IPv6 on their network adapter resolves the "unable to connect" error, especially when playing across different Windows versions.

Minimize the game and your friend directly through the Ubisoft Connect friend list. Clear the Game Cache Quit to the main

While does not have a dedicated "LAN" button in the traditional sense, you can effectively run a stable local session by ensuring your Ubisoft Connect settings and network configurations are synchronized. Essential Fixes for Multiplayer Stability

80, 443, 13000, 13005, 13200, 14000, 14001, 14008, 14020, 14021, 14022, 14023, 14024 Anno 1800 Game Client: UDP: 18000