Screen-share relay
Starling’s screenshare service handles screen-share signalling and the server relay. Media uses a UDP listener separate from the Mumble voice port.
Publish the media address
Section titled “Publish the media address”Configure the screenshare service with a public media address reachable by clients, and open the matching UDP port in the firewall and container deployment. An HTTP reverse proxy alone cannot carry this UDP media path.
The media_port option selects the media listener. A value of 0 lets the operating system choose a port, so use an explicit port when publishing a fixed firewall rule. Follow the current example configuration and Starling configuration reference for the address fields supported by your release.
Verify outside the LAN
Section titled “Verify outside the LAN”Connect two clients through different networks, start a share, and confirm that a viewer receives frames. Check the screenshare logs and advertised address when the call connects but video stays blank.
The client also supports a peer-to-peer path where available. The share control indicates the active delivery mode. See Screen sharing and Screen-share troubleshooting.