Question

How can I conduct reverse DNS lookups efficiently using DNS footprinting methods

Answer 1

A reverse DNS lookup translates an IP address back into a domain name. This can reveal useful information about a target’s infrastructure.

Here’s how to do it in Python:

• socket.gethostbyaddr(ip) performs the reverse DNS lookup. It returns the hostname associated with the IP address.
• In this case, 8.8.8.8 (Google's public DNS) will return dns.google.

This can be useful in network reconnaissance to see what domains are mapped to certain IP addresses.