How to make iptables restore rules after reboot?

Question

linux

In general, there is a machine on CentOS 7, put iptables on it. Usually iptables restored the rules from the /etc/sysconfig/iptables file, as it did in CentOS 6, but in this case it was a fiasco.

Answer 1

In CentOS 7, this is done a little differently. If you want to return the ability to do as it was in version 6, then run the following commands:

systemctl disable firewalld
yum install iptables-services
systemctl enable iptables
service iptables save

Answer 2

Install iptables-persistent

#service iptables-persistent 
Usage: /etc/init.d/iptables-persistent {start|restart|reload|force-reload|save|flush}

Answer 3

I did this:
/etc/network/interfaces:
...
post-up /etc/network/rules.sh
...
/etc/network/rules.sh:
#!/bin/sh
/sbin/iptables - A POSTROUTING -t nat -s 192.168.3.0/24 -o eth0 -j SNAT --to-source ...
...

Answer 4

I'm on ubuntu from /etc/rc.local running a script with iptables settings

Answer 5

servise iptables save
cp iptables iptables.bak
#отредактировал как надо
servise iptables restart