# Connection Diagnostics

Troubleshoot network connection issues.

* Can't connect to the server? Start here
* eSkool tests the connection and tells you what's wrong
* Usually a firewall or network issue—easy to fix

## Run Diagnostics

Open eSkool and click the **Servers** button at the bottom left.

![Servers button.](/files/zZJcfpWiFbsQGoloKPiA)

The diagnostic runs tests on your network connection. Follow any recommendations that appear.

![Diagnostics results.](/files/nSCa7CcK8XFeKxQefnvq)

## Network Requirements

For the server and workstations to connect:

* All computers must be on the same local network
* The server must listen on HTTP port 80
* The server's firewall must allow port 80
* The router must not block port 80
* Workstations must be able to connect to port 80 on the server

## Common Issues

### Server Not Found

1. Check both machines are on the same network.
2. Make sure the eSkool server is running.
3. Check the firewall isn't blocking the connection.
4. Try running eSkool as administrator.

### Connection Timeout

1. Check your network cable or Wi-Fi.
2. Verify the server IP address.
3. Check router settings for port blocking.
4. Run the built-in diagnostics.

## Related

* [Networking Overview](/en/settings-and-help/system-settings/networking.md)
* [Backup & Restore](/en/settings-and-help/system-settings/backup.manage.md)


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