I'm in the middle of moving our public facing internet site over to a new farm with a new set of IP Addresses. My site has several alias setup that point main site name. Some of the these alias are managed by the internal IT department and others are managed by external ISPs.
So I am wondering if there is a way to do a lookup against DNS using either the main site name or the IP Address to get a list of all the sites that are aliased to that site?
I'm a DNS noobie so please execuse me if I have the DNS terminolgy wrong.
Best Answer
There is a way to do this, but it is unreliable and requires a service provider to manage a database.
One example is at DomainTools
Basically, someone with access to lots of network traffic records domain name resolutions and aggregates them into a searchable database. This will only work with routable IP addresses, so if you are trying to do this on a large internal network, tools like this one will not help you.
Note that this is NOT comparable to a reverse DNS query. A reverse DNS query is RFC sanctioned functionality and there are many tools for performing those lookups. That is something to keep in mind when communicating your intentions to other network folks.