Resolving by requester address?

[D. J. Bernstein]

Carl writes:
> Basically, I'd like a DNS server that will resolve a name based on the
> IP of the requestor.

http://cr.yp.to/dnscache/faq/pickdns.html#config
http://cr.yp.to/dnscache/faq/pickdns.html#differentiation

> So if someone wants to resolve www.webserver.com,
> it will return 192.168.1.10 (private) if the requesting machine is on
> the network 192.168.1.x.

%WS:192.168.1
+www.webserver.com:192.168.1.10:WS
+www.webserver.com:1.2.3.4

---Dan