Bifrost is a Scripts software developed by bifrost. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Bifrost:

Marydown Editor: Bifrost is a firewall management interface to iptables (iptables GUI).

The system is inspired by Checkpoint and Watchguard firewall management. We looked at the way Checkpoint works with source, destination, action and logging. At the same time, we work with incoming and outgoing traffic in a Similar way as Watchguard and PIX Firewalls.