Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application Updated 【UHD 2027】
Certain replication services default to HTTPS.
Right-click the button and select PowerShell (Admin) or Terminal (Admin) . Execute the following command to see the port owner: powershell
This guide provides a comprehensive overview of why this error happens, how to identify the conflicting application, and the steps to resolve it. Why Veeam Requires Port 443
Type this command and hit Enter: netstat -ano | findstr :443
After applying your fix, ensure that everything works correctly: Certain replication services default to HTTPS
Major Issues After Upgrading to Veeam V13: Port 443 Conflict
Get-NetTCPConnection -LocalPort 443 | Select-Object -Property LocalAddress, LocalPort, State, OwningProcess Get-Process -Id (Get-NetTCPConnection -LocalPort 443).OwningProcess
Before changing any settings, you must identify the exact Process Identifier (PID) and the name of the software that has seized the port. Open or Command Prompt as an Administrator.
If System or w3wp.exe is occupying the port, Microsoft IIS is likely running a website or another management tool (such as Windows Admin Center or WSUS) on the same host. Why Veeam Requires Port 443 Type this command
Attempt to connect to the localhost server to confirm authentication succeeds.
The fastest way to find the PID (Process Identifier) using port 443 is through the command line. Open as an Administrator. Run the following command: netstat -ano | findstr :443 Look for a line showing LISTENING in the state column. Note the PID listed at the far right of that line.
Since Veeam v13 does not currently support changing the web service port via the installer, you must resolve the conflict at the source. Solution A: Reconfigure the Competing Service
Launch the to ensure it successfully connects to the backup server backup service without network timeout errors. To help find the right fix, tell me: Attempt to connect to the localhost server to
What did the netstat command reveal was using port 443?
Note the PID (1234 in this example).
Open IIS Manager , expand your sites, and select the Default Web Site . Click Bindings in the right-hand panel. Edit the HTTPS binding and change the port from 443 to an unused port (e.g., 4443), or stop the website if it is unused. 2. VMware Workstation / vCenter Server