Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link -
Veeam Backup & Replication (VBR) v13
When upgrading to or installing , many administrators encounter the error: "Required port 443 for Veeam Backup & Replication is occupied by another application" . This occurs because port 443 is now hardcoded for the mandatory Veeam REST API Service and Web UI in version 13 . Why Port 443 is Required
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Once the upgrade completes, you may attempt to re-enable the third-party service on a different port. Registry Fix (Veeam Agents only) For standalone Veeam Agents Veeam Backup & Replication (VBR) v13 When upgrading
Reconfigure Hyper-V Replication
Since Veeam's use of 443 is hardcoded, you must typically reconfigure the other application to free up the port: : Once the upgrade completes, you may attempt to
2. Root Cause Analysis
Major Issues After Upgrading to Veeam V13: Port 443 Conflict Docker example: docker ps docker stop <container-id>
- Docker example:
docker ps docker stop <container-id> - Nginx: edit /etc/nginx/sites-enabled/* and reload.
- Avoid port conflicts from the start: Don’t install Veeam on a machine already running a web server, Skype, or SQL Server with Reporting Services.
- Use dedicated servers for Veeam backup components.
- Document your ports – Especially if you’re running multiple data protection tools in a lab or production environment.
- Docker example:
