Terraria has many options to make servers more secure/private, such as adding a password or setting up a whitelist. Whitelists are only possible using the popular TShock mod, allowing more control over servers. In addition to adding whitelists, TShock will enable users to add admins or use admin commands on Terraria servers.
1. Log in to the BisectHosting Starbase panel.
2. Stop the server.
3. Under the Config Files tab, select T-Shock Config.
4. On the EnableWhitelist line, set the value to true.
5. Press the Save button.
6. Start the server.
7. Go to the Console tab.
8. Run the following command to whitelist a player: whitelist <Player IP>
Note: It is only possible to whitelist using IP Addresses.
9. The console will confirm that the player has been whitelisted.