Delete the rules in iptables – Clear/Remove iptables rules.

Before you do general cleaning in iptables Make sure you know how to configure it according to your needs.

Clear Centos/Debian iptables rules .

The following command lines in the order below:

1. iptables -P INPUT ACCEPT
2. iptables -P FORWARD ACCEPT
3. iptables -P OUTPUT ACCEPT
4. iptables -F
5. iptables -X
6. iptables -t nat -F
7. iptables -t nat -X
8. iptables -t mangle -F
9. iptables -t mangle -X

iptables –help :

-P (policy) = chain target

–flush -F [chain] Delete all rules in chain or all chains

-table -t table table to manipulate (default: `filter’)

-X [chain] Delete a user-defined chain