If the host is running mods, every connecting player must manually download and install the exact same mod files into their game directory.

Leave blank unless the host set one in-game. Account Username: Create a unique in-game username.

The host must turn off public firewalls or add a specific inbound rule for UDP/TCP port 16261 .

Руководство :: Ultimate Multiplayer Guide [b41] and [b42]

The other players must click and enter the exact name and password.

Some common issues you may encounter while playing multiplayer in a cracked version of Project Zomboid:

Everyone should now see each other in the Radmin window with an IP address (e.g., 26.x.x.x). Step 2: Set Up the Project Zomboid Crack Fix