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The most common issues with your Foundry server on a VPS and how to fix them quickly, from crashes to lag → Learn more
Running your own Foundry server on a VPS is a lot of fun, but it also means taking responsibility when something goes wrong. Crashes, lag, and configuration issues are common challenges that every server owner encounters at some point.
To help you spend less time troubleshooting, we’ll show you the most common issues and how to fix them quickly on your VPS.
FAQ
C:\ZapX-GameServers\foundry\logs\server.log. The game log is at logs\foundry.log. Restarts after crashes are recorded in logs\supervisor.log.FOUNDRY (foundry) - Start shortcut.FOUNDRY (foundry) - Backup shortcut on your VPS to back up your world, archive, and app.cfg. Your entire VPS is also backed up daily. With an active ZapX Pass, you can restore these backups yourself.Feedback
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The cause of server issues isn’t always immediately obvious. The best place to start is the server output: if you set up Foundry using the Game Server Installer, you can find it at C:\ZapX-GameServers\foundry\logs\server.log. The game’s own log is at logs\foundry.log. Restarts after crashes are recorded by the installer in logs\supervisor.log.
If your server doesn’t appear in the server list, first check that it’s running and has finished starting up. When Foundry starts for the first time, it creates the world, which takes a few minutes. Then check that the ports are open in the Windows Firewall and your VPS's network firewall. Find out which ports Foundry needs in Foundry: Set up a server on your VPS. The server only appears in the server list when server_is_public=true is set in app.cfg. Direct connection using Connect directly by IP works regardless.
Start the server via Remote Desktop using the FOUNDRY (foundry) - Start shortcut and monitor server.log. The first startup takes 1.5 to 8 minutes because Foundry creates the world. Common causes include a typo in app.cfg, a port already in use by another program, or insufficient memory. If you changed the configuration, try reverting the change to see if that fixes the issue.
Nothing cuts a great session short faster than an unexpected crash. Causes can include an outdated server version, changed game files, an overloaded VPS, or a misconfiguration. The installer automatically restarts your server after a crash. If it crashes several times in a short period, the installer gives up. You’ll then need to fix the cause and restart the server yourself.
An outdated server can cause crashes, unexpected behavior, or startup issues, and often prevents players with a newer game version from connecting. Updates aren’t installed automatically. Open the Game Server Installer again and select FOUNDRY; it will then show Update. Alternatively, use the FOUNDRY (foundry) - Update shortcut on your VPS.
Crashes after a change are often caused by additional or modified files in the server folder, especially after a game update. Try removing any extra content and starting with a minimal configuration. If the problem goes away, add your changes back one at a time and test after each step. This will help you pinpoint what’s causing the issue.
Issues such as lag or delays often occur when the configuration isn’t suitable, the VPS doesn’t have enough resources, or too many players are online at once.
Unsuitable settings can increase resource usage and cause lag. Check the values in server\app.cfg, such as the player slots or autosave_interval. Stop the server before editing the file. Learn about all the options in Foundry: Server configuration.
Foundry needs at least 4 GB of memory. The operating system and other programs on the VPS also need resources. You can check how heavily your VPS is being used in the ZapX Dashboard under Monitoring. If memory or CPU usage is consistently maxed out, upgrading your VPS can help. Learn more in Upgrades, downgrades, renewals, and cancellations.
Ping spikes and lag are usually caused by limited VPS resources, a high player count, or a server location far from your players. First, check resource usage under Monitoring. If you suspect routing issues, see Identify network issues with WinMTR/MTR. If you still need help, contact our support team.
Game servers are occasionally targeted by DDoS attacks, which flood the server with traffic. Your VPS is protected by our DDoS protection. You can view past attacks in the DDoS Manager for your VPS in the ZapX Dashboard, if it’s available at your location. If you suspect an attack is causing issues, contact our support team.
Regular backups can save you a lot of stress. Use the FOUNDRY (foundry) - Backup shortcut to back up your world, archive, and app.cfg as a ZIP file at any time. Use FOUNDRY (foundry) - Restore to restore them. Your entire VPS is also backed up automatically every day. With an active ZapX Pass, you can restore these backups yourself and create your own. Learn more in Daily backups, restoring backups, and restricted actions.
These steps should help you resolve the issue. If they don’t, please don’t hesitate to contact our support team: simply start a Support Chat in your ZapX customer account. We’re here for you every day and will be happy to help! 🙂
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