If you encounter this conflict, identify the application using port 443 and apply the relevant solution: Hyper-V Replication Conflict
The port 443 conflict in Veeam Backup & Replication is more than just a technical annoyance. It reflects a fundamental shift in Veeam’s architecture that prioritizes security and modern web APIs. As Veeam continues to evolve, ensuring the backup server remains a dedicated, single-purpose appliance will become ever more crucial.
Exposes infrastructure endpoints for automation and third-party monitoring tools.
If the Windows Server hosting Veeam also runs IIS, the Default Web Site often binds to port 443. If you encounter this conflict, identify the application
If a local web server does not explicitly need to run secure traffic on the Veeam host, disable it: Open ( services.msc ). Scroll down to World Wide Web Publishing Service .
Various plugins use HTTPS for management. 2. Common Causes of Port 443 Conflict
tasklist /svc /fi "PID eq 4988"
: Often uses 443 for HTTPS-based replication.
If you are installing or upgrading Veeam Backup & Replication (VBR), encountering the error is a common, albeit frustrating, roadblock.
He opened a PowerShell terminal with administrator privileges. His fingers flew across the keyboard, invoking the network investigation. Scroll down to World Wide Web Publishing Service
Port 443 is the standard for HTTPS, making it a high-traffic area. Frequent "squatters" include: Hyper-V Replication: By default, Hyper-V uses 443 for its replication traffic. IIS (Internet Information Services):
The service started cleanly. No errors. No conflicts.
Open your Veeam Backup & Replication console and manually retry your failed backup or replication job. Best Practices for Veeam Deployments His fingers flew across the keyboard