: In v13.0.1.180 and newer, port 443 is mandatory for the Web Service. Currently, there is no supported method to change this port within Veeam or bypass the installer's compatibility check.
He connected a crash cart—a keyboard and monitor directly into the server.
Alternatively, you can open , navigate to the Network tab, expand the Listening Ports section, and filter by Port 443 to easily identify the application name. How to Resolve the Port Conflict
When another software occupies port 443, your backup jobs will fail. You will likely see connection timeout errors or explicit warnings stating that the transport service cannot bind to the port.
TCP 0.0.0.0:443 0.0.0.0:0 LISTENING 4 TCP [::]:443 [::]:0 LISTENING 4 : In v13
If the conflict is specific to communication with an Azure Restore Proxy, the solution is to change the port on Veeam itself. When adding or configuring the Azure Restore Proxy Appliance, Veeam allows you to specify a custom port, such as 8443 , instead of the default 443 . Ensure this new port is open and allowed in all firewalls and Azure Network Security Groups (NSGs).
This usually indicates a Windows service like HTTP.sys is holding the port. Step 2: Resolve the Conflict
To avoid port conflicts in production environments, implement these infrastructure habits:
If it is a web service (like IIS or Apache), move that service's SSL binding to a different port. Alternatively, you can open , navigate to the
If the process refuses to close, force-close it by running: taskkill /PID /F Use code with caution. Step 4: Verify Port Availability and Restart Veeam
How to find the right ports under Veeam - Starline Computer GmbH
Exposes infrastructure endpoints for automation and third-party monitoring tools.
For deeper connectivity troubleshooting, you can refer to the Veeam Ports Finder Tool to map out all required communications. " Elias said
Go to Edit > Preferences > Shared VMs , click Change Settings , and change the port number. Method B: Kill the Conflicting Process
Elias exhaled, a long, shaky breath. The port was free. The backup was running.
"Okay," Elias said, logging in. "What are you hiding?"