I installed Enterprise Red Hat Linux to be used for Internet sharing. It has 2 NIC, one for the Internet and the other for the internal network. I already have DNS (W2K server) and there are 2 DNSs given to me from the ISP. As I am new to Linux, I didn't know how to do this correctly. I entered my DNS as primary, and I entered the two IPs for the ISP's DNS as secondery and Tertiary. I can browse the internet locally without any problem, but from the client machines, I can browse only by IP address.

Can anyone out there help me please?

Thanks in advance.

What are the client machines using for DNS servers?

Clients machines are using the local DNS. When I read your question, I enterned the ISP DNS for one client and it worked perfectly. But is there a way to keep the ISP's DNS hidden for clients? I mean by only configuring the Linux server. And by the way, what do I have to enter for the "DNS Search Path?

Thank you.

You don't *have* to enter anything in the search path. The search path is a place to specify domains so that you can just use host names. For example -- You have example.com on your DNS servers. you have a host called joe.example.com. If you put example.com in the search list, you can access 'joe.example.com' with just 'joe'.

As for the greater DNS issue -- Assuming that the server set to allow queries from your client subnet and the clients can communicate with the DNS server (can they ping the DNS server's IP?), then it *should* just work.

You don't have anything odd going on with multiple subnets or anything like that do you?

Clients can ping the the DNS Server's IP without any problem. May be I should have mentioned that I am using Firestarter firewall and I enabled NAT through it. It has a default preferences to autodetect Internal Network IP range. When I enter the IP range manually and hit apply and then ok, I come back to the same preferences to say it back to Autodetect. It is not accepting the manual configuration for this option. Do u think that the problem lies here?