Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link Jun 2026

If you are upgrading from Veeam v12 to v13 and have no alternative, you can temporarily disable the conflicting service to allow the upgrade to complete:

What did the netstat command reveal to be using the port?

If changing the other applications isn't an option, you can adjust Veeam's configurations or modify its specific port requirements through the Veeam console. You may need to manually configure alternative endpoints or alter network settings in the Veeam Service Provider Console (VSPC) IIS settings to bypass the port 443 hardcoded binding. Verifying and Troubleshooting After Changes

After freeing port 443:

: If port 443 is occupied, the Veeam installer will typically block upgrades from v12 to v13 until the conflict is resolved. If you are upgrading from Veeam v12 to

For a permanent solution:

Veeam Backup & Replication (VBR) relies on specific network ports for various tasks like agent deployment, data transfer, and virtualization infrastructure integration. While many Veeam components use custom, configurable port ranges, Port 443 is frequently required. Because 443 is the standard port for HTTPS and TLS/SSL traffic, it is the default choice for secure communication. Veeam requires it for operations like connecting to the Veeam Backup Enterprise Manager (BEM), communicating with the Veeam Service Provider Console (VSPC), or managing Continuous Data Protection (CDP) and standard replication.

To identify which application is associated with that PID, use:

Run the following command to find the application associated with that PID: Because 443 is the standard port for HTTPS

Once you have the process name, use the corresponding solution below to clear port 443: Scenario A: Hyper-V Replication Server is Active

: Edit the httpd.conf or server.xml file for that software to change the listener port from 443 to another custom port. Step 3: Freeing the Port Immediately

Highlight the https binding entry running on port 443 and click .

Depending on what the commands above reveal, use these targeted fixes for common conflicting applications: Conflicting Process Common Cause Recommended Resolution System (PID 4) Microsoft IIS or World Wide Web Publishing Service Stop the WWW service or rebind IIS to a different port. vmware-hostd.exe VMware Workstation / Server sharing enabled Disable HTTPS sharing inside VMware Workstation settings. httpd.exe / nginx.exe Local Apache or Nginx web servers their policies apply.

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Major Issues After Upgrading to Veeam V13: Port 443 Conflict 11 Dec 2025 —

The Veeam development team has stated that sharing the backup server with third-party applications is because it leads to unpredictable behavior and security risks—the backup server contains keys to the entire production environment [13†L30-L35].

What did the netstat command show as occupying the port? Is this a physical server or a virtual machine (VM) ? Share public link