Windows 2000 DNS Reverse lookup with subnetted network
I have tricky problem that I am sure someone else must have came across. I have created a new child domain in AD for my company; I have an up most domain called company.com then a lower domain called ext.company.com. In the ext.company.com I have created 2 domain controllers and assigned the relevant FSMO roles and GC etc etc but I am having a problem with reverse lookup with regards to the DNS Setup.
I have setup reverse lookup before and it’s pretty simple BUT I have a subnetted IP address for both DNS servers i.e.
I am stuck because in a normal classful IP network the network ID for the in-addr.apra is simple to work for instance my test system has the ip
So the reverse lookup name would be 100.168.192.in-addr.apra as the network part of the IP address is 192.168.100 but with my production system my network ID is 10.5.208 due to the subnet mask. Obviously if I put this in then I will never be able to do a reverse lookup on 10.5.212.22. I have done some research and found RFC2317 but I am finding it heavy going and as I don't want to delegate this DNS domain I am not sure it’s the right document to solve this problem.
My only other thought is to create a separate in-addr.arpa for each classful subnet but I am not sure if there is a better way to do this or if that will even work.
Anyone else hit this wall with regards to reverse lookup and solved it?