curl --url https://raw.githubusercontent.com/panpansh/iptables.sh/master/firewall --output /etc/init.d/firewall
curl --url https://raw.githubusercontent.com/panpansh/iptables.sh/master/firewall-noip --output /etc/init.d/firewall-noip
chmod +x /etc/init.d/firewall
chmod +x /etc/init.d/firewall-noipEdit /etc/init.d/firewall and /etc/init.d/firewall-noip to match your needs
/etc/init.d/firewall
# check rules
/sbin/iptables -LWhen you are satisfied with the rules add them to sysvinit
/sbin/update-rc.d firewall defaultsAdd /etc/init.d/firewall-noip to crontab
*/20 * * * * /etc/init.d/firewall-noipin this case the script run every 20 minutes
You are welcome to make changes.