If port 443 is occupied, you must identify and reconfigure the competing application, as Veeam's use of 443 is currently non-negotiable for v13. 1. Identify the Conflicting Application
If the application occupying the port is not needed on your Veeam Backup server, the cleanest solution is to remove it.
Click , type cmd , right-click Command Prompt , and select Run as administrator . Type the following command and press Enter : netstat -ano | findstr :443 Use code with caution.
: Open Task Manager ( Ctrl + Shift + Esc ), go to the "Details" tab, and sort by the "PID" column. Find the PID you noted from the netstat output. The corresponding "Name" column will tell you the executable file (e.g., svchost.exe , Skype.exe , httpd.exe ). This executable is the application conflicting with Veeam. If the process is svchost.exe , you may need to inspect the services running under that host to pinpoint the exact culprit.
The default Microsoft web server often runs on port 443 if HTTPS sites are configured. If port 443 is occupied, you must identify
in an elevated Command Prompt to see which Process ID (PID) and executable are using the port. Common Culprits Hyper-V Replication
Major Issues After Upgrading to Veeam V13: Port 443 Conflict
Because Port 443 is the default port for secure web traffic worldwide, it is frequently claimed by other applications (like IIS, WSUS, or third-party web servers), leading to a binding failure during Veeam installation or service startup.
Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup and Replication Click , type cmd , right-click Command Prompt
If another software service claims exclusive rights to port 443 before Veeam can bind to it, the Veeam installation wizard or backup services will fail to start. Step 1: Identify the Conflicting Application
Open an elevated or Command Prompt (Run as Administrator).
With the conflicting application identified, you have a few options for how to resolve the issue. The best choice depends on your specific environment.
Web servers or management consoles (like WSUS or a local website) often bind to 443. VisualSVN or Apache: Other web-based management tools. 3. How to Resolve Since Veeam v13 currently has no supported method Find the PID you noted from the netstat output
Locate the service (e.g., World Wide Web Publishing Service for IIS, or VMware Host Agent ). Right-click the service and select . Change the Startup type to Manual or Disabled . Click Stop , then click OK . Solution 2: Change the HTTPS Binding in IIS
How to Fix: "Required port 443 for Veeam Backup & Replication is occupied by another application"
Major Issues After Upgrading to Veeam V13: Port 443 Conflict
If you want to dive deeper into this configuration, tell me: What did your tasklist command reveal?
When installing, updating, or configuring Veeam Backup & Replication, you may encounter a critical error stating that . Port 443 is the global standard for secure HTTPS traffic, and Veeam relies heavily on it for secure infrastructure communications, REST API access, and cloud plugin integrations.
This guide provides a comprehensive, step-by-step walkthrough to identify the conflicting application, free up the port, or reconfigure Veeam to use an alternative port. Why Veeam Requires Port 443