500 No response from subprocess (/usr/local/cpanel/whostmgr/docroot/cgi/addon_csf.cgi): subprocess exited with status 2

If you are getting any error as below while searching for Firewall in WHM follow the steps below to resolve it.

==========

500 No response from subprocess (/usr/local/cpanel/whostmgr/docroot/cgi/addon_csf.cgi): subprocess exited with status 2

==========

• SSH server as root user

•  vi /usr/local/cpanel/whostmgr/docroot/cgi/addon_csf.cgi

make line as the first line

•   #! /usr/local/cpanel/3rdparty/bin/perl

Reload your WHM and you will not get any such error.