Unable to launch WebUI gateway sessions in a cross origin domain configuration

To add, when there is direct line of sight between the browser and gateway (i.e. internal network), cross origin does seem to work. As far as I recall from another deployment, cross origin works fine over the internet with hub + cloudflare, so not sure if there is something different when using DVLS?

There is nothing logged in DVLS or gateway logs when the connection fails.

Hello,

Thank you for reaching out!

My name is William and I'm here to assist you.

Cross-origin domains are supported by Devolutions Server and Devolutions Gateway. One important requirement is that the TCP hostname configured on the Gateway must be resolvable and reachable by the client (browser or RDM). This hostname is used when establishing the connection to the Gateway.


To help narrow down the issue, could you please verify the following:

1. Gateway health page
   • From the client browser, try accessing the Gateway health page to confirm it is reachable: https://docs.devolutions.net/gateway/kb/troubleshooting-articles/gateway-troubleshooting/#verify-the-health-of-a-gateway
2. Gateway connection test
   • From the Devolutions Server web interface, does the Test Connection for the Gateway succeed?
3. Error messages
   • When attempting to launch the session from the Web UI, do you receive any specific error messages? If possible, please also check the browser developer console to see if any errors appear when the session launch fails.

These details should help determine whether the issue is related to Gateway connectivity, DNS resolution, or the proxy configuration.

Best regards,