“Nmap is a utility for network exploration or security
auditing. It supports ping scanning (determine which hosts are up),
many port scanning techniques (determine what services the hosts
are offering), and TCP/IP fingerprinting (remote host operating
system identification). More than 20 public beta release over the
last year went into V2.50.“
“Insecure.Org is pleased to announce the immediate, free
availability of the Nmap Security Scanner version 2.50 from
www.insecure.org/nmap/.”
“Nmap is a utility for network exploration or security auditing.
It supports ping scanning (determine which hosts are up), many port
scanning techniques (determine what services the hosts are
offering), and TCP/IP fingerprinting (remote host operating system
identification). Nmap also offers flexible target and port
specification, decoy scanning, determination of TCP sequence
predictability characteristics, sunRPC scanning, reverse-identd
scanning, and more. Console and X-Window versions are
available.”