We still don't have Firewall documentation (in development).
All ZTL Firewall rules are saved in the /etc/sysconfig/iptables-ipv4.d/ztl-rules.sh
. We don't recommend to edit this file mannually. If you want to use more complete rules you should:
1. Backup and delete /etc/sysconfig/iptables-ipv4.d/ztl-rules.sh
2. Add new rules in to the file /etc/sysconfig/iptables-ipv4.d/start
3. Restart Firewall (service iptables restart