Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application Guide

Once you know the process, decide whether to stop it or reconfigure it.

The number at the end ( 1234 ) is the (Process ID) of the application holding the port. Using Task Manager Open Task Manager and go to the Details tab.

HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication Use code with caution.

Once you know what application is using the port, choose one of the three strategies below to resolve the issue. Strategy 1: Stop or Disable the Conflicting Service

While the installer is rigid, some community experts suggest that you can attempt to change the port after the installation is successful. For other Veeam components like the , ports can sometimes be modified via IIS Manager under Site Bindings . Once you know the process, decide whether to

If the Veeam server is also a Hyper-V host, Hyper-V might be using port 443 for VM replication. Open . Go to Replication Configuration .

Major Issues After Upgrading to Veeam V13: Port 443 Conflict

Change 443 to an available alternative port (e.g., 10443 or 8443 ). Complete the setup wizard. Post-Installation via the Registry

: Alternatively, run netstat -anob | findstr :443 to see the executable name directly. Common culprits include: For other Veeam components like the , ports

Now restart Veeam Backup Service.

Various unified communications components reserve port 443 for media and signaling.

In , port 443 is a critical requirement for the new Veeam Web UI and REST API gateway. If this port is occupied by another application, the VBR installation or upgrade will fail, or services will not start correctly because the binding is "hardcoded" for these components. Identifying the Conflicting Application

Benefits

Required port 443 (HTTPS) for Veeam Backup & Replication is occupied by another application. Please free the port and restart the Veeam Backup Service.

When upgrading to or performing a fresh installation, you may encounter a critical roadblock blocking your setup: [Error] Required port 443 for Veeam Backup & Replication is occupied by another application .

Example output: