Iptables - Unblock one or more IP addresses

Hi all; simple question and I found in Google but unable to block my ip from my host.
I used following command and got nothing:

Code:

[[email protected] ~]# iptables -D INPUT -s 1.53.67.226 -j DROP
iptables: Bad rule (does a matching rule exist in that chain?).

I did 'service iptables save' as well.
And some more ip addresses I like to unblock, do you have any script?. Any help is really appreciate. Thanks.

 

Just removed my ip from the list of /etc/csf/csf.deny.
Thank you.