How to RESET/FLUSH/DELETE all iptables in Linux

Published: September 2, 2019 / Updated: April 23, 2020 Akhil Jalagam Howto, Linux, Networking

Take backup

iptables-save > ~/iptables-`date +%Y%m%d_%H%M%S`.bak

Flush now

iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

Again to restore from backup

iptables-restore < bak.file

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iptables explained

Published: August 21, 2019 / Updated: September 22, 2019 Akhil Jalagam Linux, Networking
iptables

Iptables is used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel. Several different tables may be defined. Each table contains a number of built-in chains and may also contain user-defined chains.

Each chain is a list of rules which can match … Read more

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