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

The error "Required port 443 for Veeam Backup & Replication is occupied by another application" typically occurs during an upgrade to Veeam Backup & Replication (VBR) v13, as this version introduces a hardcoded requirement for port 443 for its REST API and Web UI. Review of Issue & Solutions

: Veeam usually creates its own firewall rules, but you must ensure no external network firewalls are blocking 443 communication between the backup server and its components PowerShell commands to identify exactly which process is holding that port? The error "Required port 443 for Veeam Backup

How to Identify the Occupying Application Test the connectivity between the Veeam Backup &

1. Test the connectivity between the Veeam Backup & Replication server and the vCenter server or ESXi host using the new port.
2. Verify that backup and replication jobs are successful.

Veeam Backup & Replication uses various ports for communication between components, including the Veeam Backup Server, Proxy Servers, and Repository Servers. One of these ports is TCP 443, which is typically used for HTTPS traffic. Veeam Backup & Replication uses various ports for