Which ports should I open on a DNSOnly server?

Question

Which ports should I open on a DNSOnly server?

Answer

We recommend opening the following ports in your firewall settings on a DNSOnly server:

• 37 (rdate)
• 53 TCP and UDP (DNS)
• 2086 (WHM)
• 2087 (WHM)
• 2089 (Licensing)

Please note when connections on port 2089 (licensing) fail during license checks, the system will attempt further connections over the following additional ports:

• 23
• 25
• 80
• 110
• 143
• 993
• 995

Further information on configuring your firewall for cPanel & WHM services can be found here:

How to Configure Your Firewall for cPanel & WHM Services

Additional Resources

What ports should I open in my network firewall?

What ports does cPanel use for licensing?