Required Port 443 For Veeam Backup Replication Is Occupied By Another Application Link [new] -

The "port 443 occupied" error in Veeam Backup & Replication requires a balanced approach. While temporary workarounds can help complete installations or upgrades, the most reliable long-term solution is to configure your infrastructure according to best practices. For organizations with no other practical option, the most reliable approach is to reconfigure the conflicting application rather than attempting to modify Veeam's port usage.

What did the netstat command show as occupying the port? Is this a physical server or a virtual machine (VM) ? Share public link

Is this a Veeam server or is it managed by a Service Provider (VSPC)?

Veeam utilizes port 443 for HTTPS traffic across several core operations:

Veeam Backup & Replication (VBR) v13 is a hardcoded requirement for the new Veeam Web Service/API Gateway The "port 443 occupied" error in Veeam Backup

He changed the value to 8443 . Then, he opened the Services console, located the VMware Workstation Server service, and hit .

: Local management consoles for endpoint agents or software-defined routing applications. Phase 1: Identify the Occupying Application

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: Often uses 443 for HTTPS-based replication. What did the netstat command show as occupying the port

If you have a converged environment where your Veeam server is also a Hyper-V replica server, you will need to change the replication port. Open the on your host. Right-click the Hyper-V host and select Hyper-V Settings . Go to the Replication Configuration tab.

If the conflicting application is :

on your Veeam Backup server.

In IIS, this is achieved by modifying the site's configurations and selecting the explicit IP from the drop-down menu instead of leaving it as All Unassigned . Strategy 2: Upstream Destination NAT (DNAT) Veeam utilizes port 443 for HTTPS traffic across

Because port 443 is hardcoded into the API gateway of modern VBR platforms, trying to force-change Veeam's ports inside the registry can completely break communication to the console and identity components. If you cannot change the port configuration of the conflicting application permanently, use one of the architectural workarounds below: Implementation Concept

Then restart the Veeam Backup Service:

This error typically occurs during the installation or upgrade to Veeam Backup & Replication v13 (or newer), as port 443 is now hardcoded and required for the Veeam Web Service/API Gateway