This guide explains how to diagnose and fix Virtualizor license synchronization problems.

Common causes include:

  • DNS resolution issues
  • Network connectivity problems
  • Firewall restrictions
  • Outdated license information

Troubleshooting License Sync

Step 1: Verify Domain Resolution

First, check whether your server can resolve the Virtualizor licensing server.

Run:

ping virtualizor.com

Expected Result

The domain virtualizor.com should resolve to an IP address.

Note: A successful ping reply is not required. Only DNS resolution is important.

Step 2: Fix DNS Resolution (If Required)

If the domain does not resolve to an IP address, add Google’s public DNS server.

Run:

echo "nameserver 8.8.8.8" >> /etc/resolv.conf

After updating the DNS configuration, test again:

ping virtualizor.com

Step 3: Refresh the License

After confirming DNS is working:

  1. Log in to your Virtualizor Admin Panel.
  2. Navigate to:
Configuration → License Info
  1. Click Refresh License Info.

This forces Virtualizor to contact the licensing server and synchronize the latest license information.

Step 4: Refresh Your Browser

After refreshing the license:

  • Press
Ctrl + F5

This performs a hard refresh and clears the browser cache.

Step 5: Verify the License Status

Return to the License Info page and verify that:

  • License Status is Active
  • License Expiry is displayed correctly
  • License synchronization completed successfully