WHM includes a feature that allows your customers access the following accounts from behind a firewall with port 80:

• cpanel.example.com — The customer’s cPanel account.
• whm.example.com — The customer’s WHM account.
• webdisk.example.com — The customer’s Web Disk account.
• webmail.example.com — The customer’s Webmail account.

Note
In these examples, example.com stands for the customer’s domain.

To enable this feature, select On for the following settings in WHM’s Tweak Settings interface (Home >> Server Confirguration >> Tweak Settings):

• Proxy subdomains
• Proxy subdomain creation

You can also use the /scripts/proxydomains to reconfigure the DNS entries manually.