Major Issues After Upgrading to Veeam V13: Port 443 Conflict
Or using PowerShell:
Get-Process -Id (Get-NetTCPConnection -LocalPort 443).OwningProcess Use code with caution. Common Culprits and How to Handle Them
Then restart the Veeam Backup Service:
The "Required port 443 for Veeam Backup & Replication is occupied by another application" error typically occurs when upgrading to . In this version, port 443 is hardcoded for the new Veeam Web Service/API Gateway and cannot be changed through standard supported methods . Identifying the Conflicting Application Major Issues After Upgrading to Veeam V13: Port
Then resume Veeam installation and restart IIS afterward [20†L28-L31].
Port 443 is the standard port for HTTPS (Hypertext Transfer Protocol Secure), responsible for encrypted web traffic. Within the Veeam ecosystem, it serves several vital functions:
As changing Veeam's port is not an option in v13, you must address the conflicting application:
: Open CMD as Administrator and run: netstat -anob | findstr :443 IIS (Internet Information Services) There are two main
:
: If your backup server also acts as a Hyper-V replica server, it often reserves port 443. IIS (Internet Information Services)
There are two main ways to resolve this: change the port for the conflicting application (Recommended) or configure Veeam to use a different port.
: Sometimes conflicts with Veeam's ability to load its console. How to Resolve the Conflict Since port 443 is it often reserves port 443.
Starting with , port 443 is a required and hardcoded port for the Veeam Web Service/API Gateway . This change often causes conflicts if the same server is already performing other roles, such as hosting a Hyper-V Replication server or another web application . Critical Conflict: Veeam v13 and Port 443
Replace 4 with the PID you obtained from the netstat output. You can also use PowerShell:
If you cannot move the conflicting application (for example, if this is a strictly locked-down management server), you can tell Veeam to use a different port during installation or configuration.