Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link Instant

We’ve all been there. You’re in the middle of deploying or updating Veeam Backup & Replication, feeling confident, when suddenly the wizard stops you dead in your tracks with the dreaded error:

This error stops the installation process because Veeam requires (HTTPS) for essential secure communication, including the newer "Veeam Web Service". This conflict is common on smaller, single-server environments where other services are already using this standard web port. 1. Why is Port 443 Crucial for Veeam?

Alternative backup solutions, remote management tools, and various enterprise applications frequently use port 443 for their web interfaces.

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may suggest stopping it just for the installation, the VBR console may still fail to work later if the conflict returns Important Compatibility Notes Port is Hardcoded : In version 13.0.1.180 and newer, there is no supported method to change this port for the internal Veeam Web service Database Compatibility : Ensure your SQL database is at least SQL Server 2016

: The VBR v13 installer strictly blocks upgrades if port 443 is in use. There is currently no supported way to change this port within Veeam or bypass the check.

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The error occurs because Veeam Backup & Replication (VBR) v13 introduced a hardcoded, mandatory requirement for TCP port 443 to host its REST API Gateway and Web UI . If another service (such as IIS, Apache, VMware Horizon, or Hyper-V Replication) is already listening on port 443, the Veeam installation or upgrade installer will block. Because this port is hardcoded into VBR v13, the only supported solution is to identify the conflicting application and reconfigure or move it to a different port . Why Veeam Backup & Replication Now Mandates Port 443

Restart the service. Note: If Veeam's web service fails, you may need to use Solution B. Solution B: Change the Port for the Conflicting Application

Look at the lines indicating a LISTENING state. The number at the far right of the output is the . To identify the application name by its PID, run: tasklist /FI "PID eq " Use code with caution. Common Culprits in Veeam Environments their policies apply.

netstat -ano | findstr :443

Before changing any settings, verify that Port 443 is actually blocked and identify the Process Identifier (PID) using it. Use Command Prompt Open as an Administrator. Run the following command: netstat -ano | findstr :443 Use code with caution.