Show rules with line numbers
sudo iptables -L --line-numbers
Insert rule at line Z
sudo iptables -I INPUT Z -p tcp --dport 22 -j ACCEPT
Delete rule at line Z sudo iptables -D INPUT Z
Save changes
sudo dpkg-reconfigure iptables-persistent
Show rules with line numbers
sudo iptables -L --line-numbers
Insert rule at line Z
sudo iptables -I INPUT Z -p tcp --dport 22 -j ACCEPT
Delete rule at line Z sudo iptables -D INPUT Z
Save changes
sudo dpkg-reconfigure iptables-persistent