: Log into your router's admin panel using your Default Gateway address in a browser.
To download and set up a Terraria dedicated server on your PC, you can either use the official files provided by Re-Logic or install it directly through Steam's built-in tools. Setting up a dedicated server allows you to keep a world running even when you aren't playing, so friends can join at any time. 1. Download Server Files
Once downloaded, locate the server executable file (usually TerrariaServer.exe ) in your installation folder.
: Open your Steam Library , click the dropdown filter to enable "Tools" , and search for "Terraria Dedicated Server" . Install it just like a game. 2. Launching and Configuration
For friends outside your local home network to join, you must open on your router.
: Open Terraria, select Multiplayer > Join via IP , and use the address 127.0.0.1 (localhost).