John breathed a sigh of relief, happy that he had resolved the issue before it caused any major problems. He made a mental note to double-check the configuration of new applications before they were deployed, to avoid similar conflicts in the future.
$port = 443 $connections = netstat -ano | select-string ":$port " if ($connections) Write-Host "Port $port is in use:" -ForegroundColor Red $connections else Write-Host "Port $port is free." -ForegroundColor Green
Veeam's decision to hard-code port 443 for the new web service and API gateway was intentional to address security concerns, aiming to prevent the backup server from hosting other publicly exposed services. This approach, however, has impacted: John breathed a sigh of relief, happy that
If an upgrade is failing because port 443 became occupied after your initial install, you can change Veeam's assigned ports via the Windows Registry. Open regedit as an administrator.
Because Veeam v13 hardcodes port 443 for its integrated API gateway, the manufacturer strongly discourages multi-tenant hosting where other web services reside on the core backup server. For absolute architectural stability and security, it is highly recommended to isolate Veeam Backup & Replication on a dedicated, standalone machine or specialized appliance rather than sharing a workspace with production web servers. This approach, however, has impacted: If an upgrade
This issue arises because introduces a new Veeam Web Service/API Gateway that strictly requires port 443. Unlike previous versions, this requirement is currently hardcoded for the core web service, making it a "blocker" during setup. 1. Identifying the Conflicting Application
netstat -ano | findstr :443
Run the following command to see what is listening on port 443: netstat -ano | findstr :443 Use code with caution. Copied to clipboard Locate the Application: Note the PID in the far-right column (e.g., ). Use this command to see the application name: tasklist /FI "PID eq [YOUR_PID]" Use code with caution. Copied to clipboard Alternative: Task Manager , go to the tab, and sort by PID. 2. Common Culprits Several services frequently "park" on port 443: Hyper-V Replication: If your VBR server also acts as a Hyper-V Replica server, it may be using 443. IIS (Internet Information Services):
: In the terminal, type the following command and press Enter: netstat -aon | findstr :443 For absolute architectural stability and security, it is
To make your backup environment work perfectly, let me know: What is currently using port 443?
Progress through the Veeam installation wizard until you reach the step.