easyfw is Tcl/Tk based graphical interface to ipchains or ipfwadm. Easy GUI for beginners to generate ipchains/ipfwadm script.

lokkit

lookkit is a very basic firewall configuration tool. It is a console based tool. lokkit asks a small number of simple questions and writes a firewall rule set based on the input. lokkit can't create a complex firewall configuration.

mason

Console based interactive firewall builder for advanced users.

Monitoring tool of PPP and eth card

A little, eye candy and fast PPP/eth-card monitoring utility is inbuilt in the GKrellm panel. Just activate and set the 'internet' option to monitor different ports and 'net' option to monitor eth-card(s)/ppp etc.