1. Save your current firewall rules 
   # iptables-save > /etc/iptables.bak
2. Open /etc/iptables.bak in your favorite text editor
   # nano -w /etc/iptables.bak
3. Restore all rules to be part of your current configuration
   # iptables-restore  /etc/iptables.bak
4. Save the configurations:
   # /etc/init.d/iptables save
5. Back up configuration
   # cp /var/lib/iptables/rules-save /var/lib/iptables/rules.working
6. Check startup script 
   # /etc/init.d/iptables start; /etc/init.d/iptables stop; /etc/init.d/iptables start
7. Add to default runlevel
   # rc-update add iptables default