save iptables rules (ubuntu and centos)

 

 

1.Ubuntu

First, save the existing rules:

iptables-save > /etc/iptables.rules

Then create a bash script, and save it to /etc/network/if-pre-up.d/ directory:

#!/bin/bash
iptables-restore < /etc/iptables.rules

In this way, each time the system iptables rules will be automatically loaded after reboot.
! / \ Note: Do not try to execute the above command in .bashrc or .profile, because the user is not usually root, and this can only be loaded iptables rules at login

2.CentOS, RedHat

 

# Save iptables rules 
Service iptables the Save 

# iptables restart service 
Service iptables STOP 
Service iptables Start

View the current rules:

cat  /etc/sysconfig/iptables