On CentOS 7 (CloudLinux 7) Server starting csf firewall got following error

[root@server78 ~]# csf -r
Flushing chain `INPUT'
Flushing chain `FORWARD'
Flushing chain `OUTPUT'
Flushing chain `GALLOWIN'
Flushing chain `GALLOWOUT'
Flushing chain `GDENYIN'
Flushing chain `GDENYOUT'
Flushing chain `PREROUTING'
Flushing chain `INPUT'
Flushing chain `OUTPUT'
Flushing chain `POSTROUTING'
Deleting chain `GALLOWIN'
Deleting chain `GALLOWOUT'
Deleting chain `GDENYIN'
Deleting chain `GDENYOUT'
open3: exec of /usr/sbin/ipset flush failed at /usr/sbin/csf line 4752.
[root@server78 ~]#

I checked if command /usr/sbin/ipset exists, but was not found. So checked which package provide this command.

[root@server78 ~]# /usr/sbin/ipset
-bash: /usr/sbin/ipset: No such file or directory
[root@server78 ~]# yum whatprovides "/usr/sbin/ipset"
Loaded plugins: fastestmirror, rhnplugin
This system is receiving updates from CLN.
Loading mirror speeds from cached hostfile
 * cloudlinux-x86_64-server-7: xmlrpc.cln.cloudlinux.com
ipset-6.19-4.el7.x86_64 : Manage Linux IP sets
Repo        : cloudlinux-x86_64-server-7
Matched from:
Filename    : /usr/sbin/ipset



[root@server78 ~]# 

Problem is fixed by installing package ipset with yum

yum install -y ipset