OpenSRS Connection Errors

Problem

You see connection errors while using OpenSRS for domain registrations.

Cause

This error indicates that your firewall is blocking the connection.

Solution

This troubleshooting information only applies to self-hosted WHMCS installations.

Check to ensure that port 55443 and port 55000 are open in your server’s firewall.

troubleshooting troubleshooting-article domain-registration opensrs

Last modified: 2025 October 17