How to Set Up a Garry’s Mod TTT Server

Choose a hostname that tells players what they are joining. Use sv_password for a private server and remove or change it deliberately when opening the server publicly. Administration, RCON and permission settings require their own secure values; never reuse a normal player password for administrative access.

sv_location controls the country or regional flag shown by the server browser. Facepunch documents ISO alpha-2-style values such as us and gb, plus the special value eu. Set it only when the displayed region is accurate enough for your players.

Set the map cycle and player count deliberately. TTT map rotations should contain only maps installed on the server, and the first map in the launch command should be a known-good test map. TTT ConVars can be placed in configuration files. If you need to change and save settings while the server is running, an administration framework such as ULX can provide a more manageable workflow; review its permissions before granting access.

Mount content from other Source games

Some maps and addons depend on models, textures, materials or sounds from Counter-Strike: Source, Team Fortress 2 or another supported Source title. Garry’s Mod can be directed to those installed content directories through garrysmod/cfg/mount.cfg.

Use the paths for the games installed on the same machine, following the syntax shown in Garry’s Mod’s mount.cfg documentation. Restart the server after changing the file. Missing checkerboard textures, error models or silent weapons are often a content-mount problem rather than a TTT configuration problem.

• Confirm the source game is installed on the server, not only on your personal computer.
• Check that the configured directory path is correct for the operating system.
• Confirm that redistribution of the required game content is permitted under the relevant game terms.
• Test each dependent map after mounting and before adding more addons.

Make the server survive disconnects and reboots

Linux process supervision

Running srcds_run in an SSH window is not a persistence strategy. Use a service manager, terminal multiplexer or another supervisor that restarts the process and records its output. The simplest reboot mechanism is a crontab @reboot entry, but it should call a script that changes to the server directory, sets the required environment and starts the process as the dedicated user.

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A service manager is preferable for a long-running public server because it can express startup ordering, automatic restarts and clean shutdown behavior. Whichever mechanism you choose, test it by stopping the process, rebooting the machine and confirming that the server returns with the intended map, collection and token.

Windows restart planning

On Windows, create a batch or PowerShell launcher containing the complete command and run it through Task Scheduler or a service wrapper. Configure it to start at boot, run under the dedicated account, restart after an unexpected exit and write logs to a known directory. Test a reboot rather than assuming that a desktop shortcut will run unattended.

Safe updates

Stop the server before running SteamCMD validation or updates. Updating while files are in use can leave a mixed installation or lock files needed by the updater. After an update, launch once without inviting players, watch the console for gamemode and Workshop errors, and only then reopen the public port.

Verify the installation before inviting players

1. Start the server with the intended command and read the console from the beginning.
2. Confirm that terrortown is the active gamemode.
3. Confirm the first map loads and that the configured slot count is correct.
4. Wait for the Workshop collection to complete downloading.
5. Check that the GSLT authenticates without an error.
6. Join from the host machine or local network first.
7. Test one connection from outside the host network, using the public address and configured port.
8. Start a round and test the maps, roles, weapons, sounds and any TTT2 extensions that matter to your group.
9. Stop and restart the process to verify that all persistent settings return correctly.

Keep the first public test small. A short test with two or three players exposes missing content and permission mistakes without creating a confusing log full of unrelated addon interactions.

Troubleshoot the problems players see most often

The server does not appear in the browser

• Confirm the process is running and listening on the configured port.
• Verify the operating-system firewall and provider firewall allow the same port.
• Check that the GSLT was created for app ID 4000, is valid and is not being reused by another server.
• Inspect the startup command for a typo in +sv_setsteamaccount or an accidental -noworkshop flag.
• Check the provider’s public IP and whether the machine is behind a second router or carrier-grade NAT.
• Read the console for Steam authentication, Workshop or map-load failures before changing unrelated settings.

Players cannot connect while the server is visible

• Confirm they are using the actual public address and port, not a private LAN address.
• Check that the host firewall permits inbound traffic and that the provider has applied the rule.
• Temporarily test with the password policy you intended; a stale sv_password is easy to overlook.
• Compare the player’s required Workshop content with the collection and remove or replace broken items.

The server loads the wrong mode

Check the launch argument for the exact value +gamemode terrortown. A server can load successfully while remaining in another mode if that argument is missing, misspelled or overridden by a later configuration. Review the startup console rather than relying on the server name.

Maps or addons are missing

• Confirm the collection is public or otherwise accessible to the server account.
• Check that the collection ID is correct and that Workshop downloads finish before map selection.
• Look for -noworkshop, download errors and addon dependencies.
• Verify that every map in the rotation exists on the server.
• For error models, textures or sounds, inspect mount.cfg and the installed Source-game content.
• Remove the newest addon and retest if the failure began after a collection change.

The server stops after you close the terminal or reboot

Move the launch command into a supervisor, scheduled task or service and run it under the dedicated account. A one-time shell command does not automatically restart after a reboot. Test the recovery path intentionally before advertising continuous uptime.

Operate the server safely

• Keep SteamCMD and the dedicated server updated, but schedule updates during a maintenance window with the process stopped.
• Back up server.cfg, map-cycle files, permission databases and launcher scripts, while excluding GSLTs and other secrets from ordinary backups.
• Use least-privilege file permissions so the game process cannot modify unrelated system directories.
• Review every addon before adding it. A large collection increases download time, conflict risk and the number of components that require updates.
• Give administrative permissions to as few people as practical, and keep an audit trail for configuration changes.
• Monitor disk space and log growth; workshop downloads and verbose logs can silently consume a small server volume.
• Document the exact launch command, port, collection ID, map cycle and restart method so another administrator can recover the service.

When managed hosting is the better choice

A managed Garry’s Mod host can remove the need to administer SteamCMD, process supervision, firewall rules, Workshop downloads and reboot recovery. It is useful when you need a public server but cannot maintain a Linux or Windows machine. Before committing, verify that the provider supports the TTT or TTT2 branch you use, accepts Workshop collections, permits the addons and maps you need, offers a location close to your players, and documents backups, restart behavior, pricing and uptime terms. You still need to understand GSLTs, content compatibility and configuration so that a control panel does not hide a broken setup.

Recommended first deployment

For a reliable first server, install app 4020 into a separate directory, launch a clean TTT instance on a known map, create one GSLT for app ID 4000, then add a small Workshop collection. Configure the hostname, password policy, location and map cycle only after the clean test works. Finally, place the complete command under a supervisor, open the actual configured port, and test an external connection. Expand the collection one addon at a time so every failure has a clear cause.

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