Firewall

The Firewall (ファイアーウォール, Faiāwōru) is a defensive barrier that defends the Net.

It is defended by Guardromon, and together with the Net Keeper, Giromon, they repel those who try to illegally enter the Net. Both Meramon and Birdramon were generated from the Firewall, and Agnimon is an incarnation of it.