Starting with , port 443 is a hardcoded requirement for the Veeam Web Service and API Gateway. If this port is occupied by another application, the VBR services will fail to bind and start. Identifying the Conflict
netstat -ano | findstr :443
Securely transmitting data to service providers.
Required Port 443 for Veeam Backup & Replication is Occupied by Another Application Starting with , port 443 is a hardcoded
He checked the Veeam logs again. The backup job was retrying in ten minutes. He needed a surgical fix.
The "VMware Host Agent" often claims 443.
Option B — Move the conflicting app to a different port Required Port 443 for Veeam Backup & Replication
If replications continue to fail, check the Veeam Backup & Replication logs located by default at C:\ProgramData\Veeam\Backup . Look for specific connection errors that point to the exact IP and port Veeam is attempting to access.
netsh http show urlacl netsh http show servicestate
: Frequently conflicting services include IIS (Internet Information Services) , Hyper-V Replication , Remote Desktop Web Access , or third-party security agents like Qualys . Solutions and Workarounds The "VMware Host Agent" often claims 443
Configure edge routing rules or network address translation rules to map incoming traffic to alternative destinations.
Expand your server, expand , and right-click the specific site (such as Veeam Backup Web UI) and select Bindings . Select the https binding and click Edit . Change the port to a different available port (e.g., 8443 ). Restart IIS to apply the changes. Scenario C: Changing Veeam's Required Ports
Major Issues After Upgrading to Veeam V13: Port 443 Conflict