Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link |verified| | Genuine
netsh http delete urlacl url=http://+:443/ netsh http delete urlacl url=https://+:443/ After deletion, restart the Veeam services or the installer. If w3wp.exe or inetinfo.exe is the offender, IIS is running. You have three choices:
| Application / Service | Typical Use Case | | :--- | :--- | | | Default Web Site, WSUS, or any internal web app. | | Microsoft SQL Server Reporting Services (SSRS) | Uses HTTP.SYS to listen on Port 443 for reports. | | Skype for Business / Teams | Can bind to ports unexpectedly. | | Remote Desktop Gateway (RD Gateway) | Uses HTTPS (443) for secure RDP connections. | | Syslog / SIEM agents | Some agents redirect SSL traffic via 443. | | Antivirus Web Filtering | Symantec, McAfee, or Cisco AMP can proxy HTTPS. | | Hyper-V Host Service | Certain Hyper-V configurations use port 443 for management. | | Docker Desktop (Windows containers) | The MobyLinuxVM engine may bind to 443. | | Previous Veeam Installation | Leftover services from a failed uninstall. | Step-by-Step Diagnosis and Resolution Step 1: Identify the Process Using Port 443 Do not guess. Use built-in Windows tools to get the definitive Process ID (PID). netsh http delete urlacl url=http://+:443/ netsh http delete
tasklist | findstr 4488
Introduction In the complex ecosystem of data center management, Veeam Backup & Replication has established itself as a gold standard for virtualization and cloud data protection. However, even the most robust platforms can encounter frustrating roadblocks. One of the most common and cryptic errors that administrators face during installation or upgrade occurs when Veeam attempts to bind to Port 443 . | | Microsoft SQL Server Reporting Services (SSRS)
Remember, port 443 is prime real estate. Decide which application—Veeam or the existing service—is more critical for your environment, then adjust accordingly. With the steps above, you’ll have Veeam Backup & Replication listening securely and ready to protect your data. Need further assistance? Visit the official Veeam R&D Forums or open a support case with Veeam Customer Support. Include the output of veeamportssniffer.exe (available in the Veeam ISO tools folder) for rapid troubleshooting. | | Syslog / SIEM agents | Some
netstat -aon | findstr :443 You will see output similar to: TCP 0.0.0.0:443 0.0.0.0:0 LISTENING 4488
Run this command in an elevated CMD or PowerShell: