I have to following set-up:

Internet - ISDN LanModem & DHCP server - Network

The problem I have is that in setting up the Linux box (with RedHat 7.1) as a DNS server the howtos tell me to list all the computers and their IP addresses when the addresses are dynamic.

After I get the DNS setup I would like to configure the linux box as a firewall for the network. Do you know any good how-tos for doing this with?

Thanks,
Chris

not sure what your question is, exactly... it sounds like you want to know how to configure your DNS server if the IP addresses for your computers are dynamic?
DNS was not really designed to handle the dynamic mapping of addresses very easily. By nature, it is for a mapping of static hostnames to static ip addresses.. anything other than this and the administrative overhead can be irritating and difficult. There is a package for DDNS, (or Dynamic DDNS) that will register a host's address in DNS as the lease is given out by the DHCP server. As far as how reliable this is.. that's one a lot of ppl have thier doubts on.

One thing you may delve into is to set up a host on the gateway to your network that will serve as an IP-masq host. You could then set up static hosts inside the network, that would be mapped to the one public address on the outside, and this host would provide network address translation between the internet and your internal network, which could then consist of static addresses and make your quest for dns a lot easier.

just a suggestion.

Yeah, I did mean that, sorry I wasn't clear at all!

I'll have a go at what you're suggesting, thanks for replying.


Thanks again,
Chris

OR you could just make the timeout ridiculously long. that way you can plug new boxes into the netowrk and not have to worry about setting up the netowrk info on the host. ie rtr info, domain name, etc.