# Firewall/Proxy settings

If you are experiencing issues with connecting to our licensing server due to a firewall or proxy, add an exclusion to your firewall or proxy settings to allow the following URLs on port 443:

• engine.tilialabs.com
• engine2.tilialabs.com
• engine3.tilialabs.com
• engine4.tilialabs.com
• https://cloud.tilialabs.com
• https://api.tilialabs.com
• wss://stream.tilialabs.com

Alternatively, you can set a wildcard exception for any URLs ending in tilialabs.com.