Checking behind the wall
Although it is good to have a properly setup firewall, I was wondering
what else I could do to check that the machines behind it haven't been
compromised (by an email trojan or the like)?
I was thinking of setting up a scanner (strobe/nmap/...?) to
automatically do a scan from a cron and mail the results to me. However,
is there any existing framework like this that I could leverage?