Let's say we have an IP that is dropped by iptables 192.168.20.2

service iptables status|grep 192.168.20.2
184  DROP       all  --  192.168.20.2       0.0.0.0/0

You can use iptables itself like this to list the line numbers:

iptables -L --line-numbers

Two Ways To Delete The iptables Rule

1.) Delete by the rule number which in our case is 184 from above.

iptables -D INPUT 184

2.) Delete based on the actual rule that we input to iptables

iptables -D INPUT -s 192.168.20.2/32 -j DROP

For example the rule would have been created using iptables -A INPUT -s 192.168.20.2/32 -j DROP so we just do the opposite to delete the rule.

iptables, delete, destination, ip, itselflet, grep, input,

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