- List current tables with line numbers and stats
iptables -L INPUT --line-numbers -v
- Append another rule
iptables -A INPUT -s 58.245.23.126/24 -j DROP
- Delete rule #3
iptables -D INPUT 3
- The moment you apply IPTABLE rule it immediately becomes active.But it will not survive a reboot.
- To be able to survive IPTABLES a reboot in your network configuration file /etc/network/interfaces file (referring to a Debian/Ubuntu system) you need to add:
pre-up iptables-restore < firewall.txt
Making changes persistent in CentOS 5
iptables rules are stored in memory.