i'm running redhat 7.2 with kernel 2.4.17 on an old P166. I use it as a router, firewall, dhcp server. i had everything working untill i was looking around in setup(command: setup). i was concerned that the default firewall that installs with redhat was conflicting with my firewall script(i've been having problems with port forwarding). so i went into the firewall options in setup and choose no firewall - i had it set at high security. after that i couldnt get outside connectivity(and rreceived ipchains errors on boot) from behind the linux box. so i went in and put it back on high security but still cant connect to the outside world. i would like to sort this out but am a little unclear as to where to staart. i would to just have myu firewall script running my firewall, not redhats default and then mine on top. any ideas? tia

RH script is in /etc/rc.d/rc.firewall* files (or somewhere near). Edit them to fit your needs.
BTW You can always use ipchains -L to view your current rules... Have you checked which of them stops your connection?

as I know you should use iptables with kernel 2.4.*

yeah, but for some reason redhat uses ipchains instead of iptables, even though both are compiled into the kernel. sorta odd since redhat likes to push newer modules.

What about RH7.3, does it use iptables by default, or are they still sticking to ipchains?