If I have multiple hosts configured on one machine (a la apache's VirtualHosts), how can I do a lookup on the IP and find all domains configured to reach it?
For example, I have several web and email domains hooked-to my server. How can I find all domains that point to it?
Is it even possible?
I have DNS A entries for all the domains I own, plus I know some friends' domains point to my server. What I'd like to see is if folks I don't know about are pointing there, too. (Or if someone has repointed their domain elsewhere, and I can delete their 'old' website from my server.)