firewall prevents dns access
I upgraded to RH9 a few months back and have had a lot of trouble getting my dialup connection up and running again, I've managed to solve all of the problems except one which is related to my firewall. I can't access/ping any websites by name, only by numerical address, which sounds like a DNS problem. If I either turn off my firewall completely, or issue an "ipchains --flush" as root, then everything works fine.
disabling my firewall to get on the net sounds like asking for trouble to me. There must be a way to allow DNS packets through but keep the rest of the stuff out. I've tried bringing the firewall security level down to medium and allowing incoming DHCP, but that didn't help. Does anyone know how I can fix this?
I would greatly appreciate any suggestions you might have. Many thanks in advance.