Check out this little script that I have used in the past.  It's called 
EndoShield.  I used it a number of times.

http://endoshield.sourceforge.net/

Jim

> This is a multi-part message in MIME format.
> 
> 
> I just discovered the Linux User Group on the web. I am looking for 
Linux
> assistance to solve a problem. I am new to Linux/Unix but after using 
for
> about 6 months, I can see that it is great OS. Can you recommend one 
of your
> members or a student to help me solve what I believe is a small 
problem. I
> am attempting to setup iptables on Redhat 7.2. The Linux box will be 
placed
> in front of a 4 node windows network. I an able to ping both the 
inside and
> outside network card from any of my windows PCs. But I can't ping 
anything
> on the internet from inside. I can also surf the web from the linux 
box. I
> have down loaded gShield and attempted to install.
> 
> What am I doing wrong?
> 
> Philip
> 
>