Iptables rules are by default not persistent after reboot. The objective is to make
iptables rules persistent after reboot.
Privileged remote or physical access to your Ubuntu or Debian Linux system is required to complete this task.
In order to make your
iptables rules persistent after reboot install
iptables-persistent package using
# apt-get install iptables-persistent
Any currently erected iptables rulles will be saved to corresponding IPv4 and IPv6
Updating iptables rules
To update persistent iptables with new rules simply use
iptables command to include new rules into your system. To make changes permanent after reboot run
# iptables-save > /etc/iptables/rules.v4 OR # ip6tables-save > /etc/iptables/rules.v6
Remove persistent iptables rules
To remove persistent iptables rules simply open a relevant
/etc/iptables/rules.v* file and delete lines containing all unwanted rules.