Enable NAT behind the cpanel

How to enable NAT behind the cpanel ?

Most of webhosting providers currently used NAT service for their users. When you install cPanel & WHM, the installer will detect whether your server is on a NAT-configured network. If the installer detects a NAT-configured network, your server will configure itself for NAT mode and attempt to automatically map local IP addresses to public IP addresses.

Enable NAT in cPanel server.

The /var/cpanel/cpnat file acts as NAT mode. If the installer mistakenly detects a NAT-configured network, you can delete the /var/cpanel/cpnat file to disable NAT mode. You can rebuild cpnat if you need to enable it /scripts/build_cpnat script.

cPanel will attempt to map all non-loopback IP addresses bound to any network interface on the server to a public IP address.


cPanel server will send an outgoing connection from each local IP address to the http://myip.cpanel.net/v1.0/ server.

The build_cpnat script uses http://myip.cpanel.net/v1.0/ to map local IP addresses to public IP addresses.

You can manage the following options for local and remote IP addresses in WHM:

Add a New IP Address
Show or Delete Current IP Address

If multiple local IP addresses match the same public IP address which is NOT recommended, only the first local IP address listed in /var/cpanel/cpnat will be mapped.

If you wish to use a different IP address lookup service, open the /etc/cpsources.conf file with your preferred editor and add the following line:


Refer with cpanel documentation http://docs.cpanel.net/twiki/bin/view/AllDocumentation/NATSupport#Manage IP Addresses and  Check CPNAT man page for further information.

/scripts/build_cpnat –man

  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

cPanel & WHM Version 74 Now in STABLE

cPanel has released cPanel & WHM Version 74 to the STABLE tier. It includes updates for some...

Installing cpanel on google cloud

Create a new CentOS 7 instance on your google cloud engine. From the cPanel & WHM System...

Install Free SSL Let’s Encrypt plugin in cPanel

Let’s Encrypt is a trusted, open source certificate authority that offers free SSL certificates...

Replace MySQL with Percona in cPanel Server

Percona Server is an enhanced drop-in replacement for MySQL. If you are a web hosting service...

Install nginx as a reverse proxy cPanel plugin

Install Nginx on your cPanel/WHM server using the Engintron cPanel Plugin as a reverse proxy. It...

Powered by WHMCompleteSolution