What is a Reverse IP Lookup?
A technique known as Reverse IP Lookup is a way to identify a hostname that has a DNS (A) record
associated with an IP address.
A web server can be configured to serve multiple virtual hosts from a single IP address. This is a common
technique in shared hosting environments. It is also common in many organizations and can be a great way
to expand the attack surface during web server reconnaissance. If, for example, your primary target
website appears secure, you may be able to gain access to the underlying operating system by attacking a
less secure site on the same server. Potentially bypassing the target site's security controls.
