I was wondering if in any DNS server's implementation (BIND/djbdns/anyother) is it possible to suppress NXDOMAIN response all together ?
The requirement is as follows A Campus ( e.g University) get Wimax Internet Services from an ISP. ISP provides them with the caching DNS hosted at their end.
Now if the (for some strange reason) the connectivity between Campus DNS and ISP DNS doesnt exist and can't be organised.....
With the above Premise..we hit an issue Lets say a winxp resolver gets DNS assigned via DHCP such that ISP DNS is primary ... Then when it tries to resolve its Internal A RR, it would get a NXDOMAIN rcode from ISP caching resolver since the A record doesnt exist.
In that event, if we were to silently drop NXDOMAIN responses from ISP resolver, the winxp resolver would time out and then query the INTRANET DNS and get a valid response.
So can this be done using any (free) DNS softwares ?