I ran [root@server ~]# csf -e
and it shows the following error
Error* The path to iptables is either not set or incorrect for IPTABLES [/sbin/iptables] in /etc/csf/csf.conf at /usr/local/csf/lib/ConfigServer/URLGet.pm line 39.
Compilation failed in require at /usr/sbin/csf line 34.
BEGIN failed--compilation aborted at /usr/sbin/csf line 34.
How should I fix it?