: Always install Veeam Backup & Replication on a dedicated server. Avoid co-hosting it with web servers, domain controllers, or database servers.
This error typically occurs during the installation or upgrade to Veeam Backup & Replication v13 (or newer), as port 443 is now hardcoded and required for the Veeam Web Service/API Gateway
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
Update the in each VM's replication settings to match the new port to avoid re-replicating data. Stop and Disable Conflicting Services :
The error is a common networking hurdle, not a flaw in the Veeam software. By identifying the PID using netstat and either relocating that application or dedicating the server to Veeam, you can ensure your data protection environment remains stable and secure. : Always install Veeam Backup & Replication on
Port 443 is a critical requirement for Veeam Backup & Replication. Veeam uses this port for secure communication, web services, and cloud integrations. When another application occupies port 443, Veeam installations or services will fail.
Run the following command to find the name of the application associated with that PID: tasklist | findstr [PID]
If the output shows an application name like System , IIS , sqlservr.exe , skype.exe , or vmware-hostd.exe , you have identified your conflict.
Let’s break down how to identify the culprit, fix the conflict, and get your Veeam deployment back on track. How to Resolve the Port Conflict Update the
.
Get-Process -Id (Get-NetTCPConnection -LocalPort 443).OwningProcess
These web services standardize authentication and modern console management natively over . If the VBR server host pulls double duty as a web server, a virtualization manager, or a replication host, a resource conflict occurs. Two distinct applications cannot bind to the same IP and port combination simultaneously. Common Applications That Monopolize Port 443
Update the in the settings for each VM on every host to match the new port. For IIS Sites : Open IIS Manager and expand Sites . Right-click the site using 443 and select Edit Bindings . Port 443 is a critical requirement for Veeam
TCP 0.0.0.0:443 0.0.0.0:0 LISTENING 1234
Look at the output lines. The final number listed on the right side of the active connection represents the . To pinpoint the exact application name using that PID, run: powershell Get-Process -Id Use code with caution. Step 2: Common Culprits and How to Move Them
Required for the console, RESTful API, and modern user interfaces.
Example output: