dns & firewall problem

[Clarence <c5666305@hkstar.com>]

Hello,

I recently follow the steps of Real Quellet (hello@real.ath.cx) to setup
my personal gateway and firewall on pppoe.  However, I got the following
message when I try to ping.  The dns named server didn't like the
firewall.  I don't know to solve as I am not experience enough to solve
the porblem and I am in rush. Is there anyone using the same procedures to
setup your machine which is working.  Please help.

Clarence

P.S.  which file should I provide for your reference