I'm looking for a tool like PBNJ (http://pbnj.sourceforge.net/) but not quite. The functionality I'm looking for is something I can throw into cron to run daily or weekly, scan a network(s), store the findings and produce a diff-like report of hosts and ports that (dis)appeared since the prior scan.
Any recommendation?
You can use NAGIOS
Its easy to use . And have web interface.
http://www.nagios.org/