RH 6.0 and Gatway Setup Problem.

["Azhar H. Chowdhury" <azhar citechco net>]

Dear Sir/Madam,

I have facing following problem, please help me. 

My ISP assigned me 10 fixed IP addresses for my network
(say 203.127.140.10 to 203.127.140.19). I am dialing to 
ISP from RH 6.0 (PPPD, Modem attached COM1). without any
problem I can dial to ISP and can ping/telnet/smtp etc from
RH 6.0 server but other (WinPC, Mac) can't reach outside this network. 

I installed my old RH4.2 at same machine and changed Kernel
(with IP Gateway enabled), after then everythings works fine.
I mean other can use RH4.2 machine as a gateway. 

Can you please write me where I need to make changed at RH6.0?

Looking for your kind reply.

Azhar H. Chowdhury