How to delegate subzone to other DNS server?

Question about reverse DNS?

• OK... complicated question here that can get very confusing: Is it required for the computer at the ip being rdns queried to have a dns server installed? For example if you run an nslookup on 10.10.10.1 it should return a pointer record like servername.domain.com. but is the computer at the 10.10.10.1 address required to actually have a running DNS server on it to return that result? OR..... can you NOT have a dns server installed at 10.10.10.1 and just put that pointer record on other nameservers at different addresses like ns1.domain.com at 10.10.10.2 while still returning the same pointer record when you rdns query 10.10.10.1????? On that note...... Would your ISP agree to delegate to 10.10.10.1 even though there is no active dns server on that address? Would you even need to delegate to 10.10.10.1? and on THAT note... Would you have to get your isp to delegate to the nameservers (ns1.domain.com)? Any help would be greatly appreciated.

• Answer:

  In order for Reverse DNS to work there needs to be a record in the DNS server that will tell it to do so. Otherwise it hands it off to the next (forwarding DNS) server. What exactly are you trying to accomplish? I would like to note your ISP is not going to modify any of it's DNS servers, unless your doing Tier networking or a enterprise customer. (I doubt you'd be posting here for that answer...) I've basically answered your question, but in more detail, a nslookup is going to ask your DNS server if it knows about a NS record, not an IP address (That is the purpose of DNS...) If there is a record for that machine it will return its IP. I guess this is where your Reverse DNS question comes in. If you are trying to lookup an IP, you're going to use the whois command. That's part of *Nix (Unix/Linux) OS's. not sure where it is in Windows. Sounds like you are trying to install your own DNS server too. This is not recommended as you will need to ensure this machine is on 24/7 or the "internet" won't work. However setting up your own Recursive DNS will require a Linux Server and some networking expertise. I hope this answers your quesiton.