WHM/cPanel – Change Main Server IP

Change IP Address from command line

Open up the following file, change eth0 to your primary ethernet adapter. More info here.

 vi /etc/sysconfig/network-scripts/ifcfg-eth0

and under IPADDR set it to the new IP. Update netmask and gateway if needed.

Save file and restart network

systemctl restart network

Update License

You may need to run the following to update the license on the server.


Change Server IP in WebHost Manager

Change IP for server in Basic WebHost Manager Setup

Other things to do

You may need to migrate IP’s to the new address.
If you are keeping the old address on the server, then you may need to readd it through the IP Functions.

WHM/cPanel – Works from some networks and not others.

Had a problem with a WHM/cPanel server where it was working fine from a couple different networks, but then would not work on others. The server itself seemed fine and fully operational.

Checked firewall rules on routers, server, checked IP routes, tried disabling cPHulk. Ended up being there were a couple addresses added with the incorrect subnet mask which was keeping it from working. Removed the IP’s with the wrong subnet and it started working on all networks.

[root@host ~]# ifconfig
eth0: flags=4163 mtu 1500
  inet netmask broadcast
  inet6 7f80::4588:523f:a697:c311 prefixlen 64 scopeid 0x20
  ether 4b:02:de:0d:cf:1a txqueuelen 1000 (Ethernet)
  RX packets 171071 bytes 83556877 (79.6 MiB)
  RX errors 0 dropped 0 overruns 0 frame 0
  TX packets 163710 bytes 76482245 (72.9 MiB)
  TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

eth0:cp1: flags=4163 mtu 1500
  inet netmask broadcast
  ether 4b:02:de:0d:cf:1a txqueuelen 1000 (Ethernet)

eth0:cp6: flags=4163 mtu 1500
  inet netmask broadcast
  ether 4b:02:de:0d:cf:1a txqueuelen 1000 (Ethernet)

[root@host ~]#

Under eth0:cp6 the IP has a subnet which is incorrect. Should have been a (/27) subnet.

Removed the IP out of WHM and then readded with the correct subnet mask and it now works.

Make sure you add and IP with the correct subnet

cPanel/WHM enable shell_exec

SSH into WHM server

ssh root@cpanel.host.com

Modify Website php-fpm Config File

Edit the following config file. Replace “website.com” with the website your enabling the shell_exec for

vi /opt/cpanel/ea-php72/root/etc/php-fpm.d/website.com.conf

Locate the following line and remove shell_exec from the list of disabled_functions

php_admin_value[disable_functions] = exec,passthru,shell_exec,system

The line should look like the following

php_admin_value[disable_functions] = exec,passthru,system

Restart Apache PHP FPM Service

Save the file and restart the apache_php_fpm service


Followed from

cPanel unable to access locally hosted domains

Check and verify that DNS is not being blocked upstream by a firewall. Behavior is weird, the server can get out to the internet, access to the servers IP address is available, but can’t ping domains that are locally hosted. Are also unable to ping the domains from the internet in.

To resolve the issue either disable the DNS firewall rules, or better yet add some rules to allow access to the cPanel server.

Check Access Logs for website

Typically on a cPanel host your access logs are kept in


Where username is your cPanel username and incredigeek.com is your website.

To view the logs you can use tail -f to follow the log.

tail -f /usr/local/apache/domlogs/username/incredigeek.com

You can also use grep to search the logs.

grep "text to search" /usr/local/apache/domlogs/username/incredigeek.com

cPanel custom Dovecot Query to delete email

In cPanel under an email account you can Free up Email Storage. There is a Custom query field which allows you to specify a custom Dovecot query to run. Couple examples below.

Delete email from email address

from sent@email.com

Email that contains a specific string in the message body

body "string to match in message body"

Other useful info

cPanel/WHM – Apache SpamAssassin add Domain to Blacklist or Whitelist from SSH Command Line

The domains are stored in the “~/.spamassassin/user_prefs” config file.

To blacklist a domain just add it to the config file.

blacklist_from *.domain_to_block.com

To whitelist, change blacklist to whitelist

whitelist_from *.incredigeek.com

Save and exit the file.