Network Mapping

Network Mapping

Although various network mapping tools are available, from the
excellent and free Cheops to commercial tools such as HP Openview
and Visio, these tools have often been designed to map local and
trusting networks.
When trying to map subnets across the Internet, they are less reliable at
producing a comprehensive network map. This problem is greatly
exasperated by any IP filtering, which is almost guaranteed to be
present in a modern, secured gateway. It is often worth launching a
network mapper as a background activity, as the results may
corroborate or refute the assumptions we have made by manually
examining our data.

Risk Level

Network mapping tools are not designed with stealth in mind, and
therefore present a High risk of discovery. As the security devices often
impair their operation, their use is limited in this sort of remote
enumeration.