Finding live hosts.
This tool uses SNMP to scan for hosts, which is a different thing than simply pinging them. Hosts willingly spill their guts to SNMP queries, making this a good LAN enumerating tool.
Unfortunately, this is a Windows tool written in C# and ported to BackTrack via Mono. With my most recent dist-upgrade it finally works, using a GUI that’s supposedly “self-explanatory.” True enough, with the caveat: check the Dictionary Mode or Brute Force Mode checkboxes, or you’re not really doing much.
Network Mapping: Identify Live Hosts