Vary DNS resolution according to requesting IP

Question

I'm looking for a way of getting our DNS server to do a reverse look-up in order to resolve placeholder values differently according to the requesting machine's IP address.

Variables

• A placeholder value called SYSWEB to be resolved by DNS
• Websites: www.website.dev.net and www.website.uat.net
• Machines: Machine1 and Machine2

Conditions

• If Machine1 attempts to connect to SYSWEB, the DNS server will resolve it to www.website.dev.net
• If Machine2 attempts to connect to SYSWEB, the DNS server will resolve it to www.website.uat.net

I've already tried to do this with BIND DNS, following the implementation laid out here, but I have not made any progress worth noting....

The main problem I'm having is that I cannot allow the DNS to resolve an IP address from the placeholder value, it needs to be a domain name.

Surely someone out there has successfully done what I'm failing to do

Answer 1

You need to have two separate zone files and route access to the correct zone file based on views. This is usually called split-horizon DNS and there are plenty of examples on the net, e.g.

http://www.zytrax.com/books/dns/ch6/#split-view

http://www.knowplace.org/pages/howtos/split_view_with_bind_9_howto.php