Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application -

Several enterprise applications frequently contest Veeam for port 443. Here is how to handle the most common offenders. 1. Microsoft Internet Information Services (IIS) IIS often claims port 443 for default web bindings.

Ensure no process is listening on 0.0.0.0:443 or [::]:443 .

After stopping or reconfiguring the offending application, verify that Port 443 is completely clear. Return to your Administrator Command Prompt. Run the check command again: netstat -ano | findstr :443 Use code with caution.

Before you can fix the issue, you must find out exactly which process is currently listening on port 443. Using Command Prompt (Netstat) Return to your Administrator Command Prompt

If another application (such as an RMM tool or an older software version) is holding the port, you will need to:

To prevent port conflicts and ensure maximum backup performance, keep these architecture rules in mind:

Open IIS Manager, select the Default Web Site, click Bindings in the right-hand panel, edit the HTTPS binding, and change the port from 443 to another number. If another application uses this port

You’re installing or upgrading Veeam Backup & Replication, and suddenly you hit a roadblock:

: Hosting a local corporate website, intranet portal, or management console.

Ensure Veeam Backup Service and Veeam Web Service are running. select the Default Web Site

If another application uses this port, your backups will fail.

To match that PID to a real application, execute this command (replace 1234 with your actual PID): tasklist /fi "pid eq 1234" Use code with caution. Step 2: Common Culprits and Their Fixes