Get-NetTCPConnection -LocalPort 443 | Select-Object LocalAddress, LocalPort, OwningProcess, State | Format-Table Use code with caution.
Elias sighed, the sound heavy in the empty server room. Port 443. The golden gate of network traffic. The standard port for HTTPS, essential for the Veeam Backup Catalog to communicate with the repository server over WAN accelerators. Without it, the backup chain was dead in the water.
Change its startup type to to prevent it from auto-starting and hijacking the port upon a system reboot during the Veeam upgrade. Step 3: Resume the Veeam Upgrade or Installation
on your Veeam Backup server.
Local management agents installed alongside the backup server frequently conflict.
Update the replication settings for each individual VM on the host to match the new port. Option 2: Temporary Service Suspension If the conflicting application is only needed occasionally:
For minor standalone management utilities or secondary services: Open services.msc via the Windows Run dialog ( Win + R ). The golden gate of network traffic
To resolve the conflict, you must find out exactly which application or PID (Process Identifier) is occupying port 443. Open or Command Prompt as an Administrator.
Major Issues After Upgrading to Veeam V13: Port 443 Conflict
If you are installing or upgrading Veeam Backup & Replication (VBR), encountering the error is a common, albeit frustrating, roadblock. Change its startup type to to prevent it
: Powering the Veeam self-service portals and API integrations.
The error is a common networking hurdle, not a flaw in the Veeam software. By identifying the PID using netstat and either relocating that application or dedicating the server to Veeam, you can ensure your data protection environment remains stable and secure.
Required for the console, RESTful API, and modern user interfaces. and modern user interfaces.
If you recently uninstalled Veeam or had a failed upgrade, some services may linger.
Before you can fix the issue, you must determine which application is currently listening on port 443. You can do this via the Command Line or PowerShell.