Test your PC or Firewall
PC Flank

www.dslreports.com/scan
www.hackerwatch.org
scan.sygatetech.com
www.auditmypc.com
Email Security Test
www.gfi.com/emailsecuritytest
HOW TO DETERMINE IF YOUR NETWORK IS VULNERABLE:
Several sites have been established to do both active and passive scanning
of networks to determine whether or not directed-broadcast is enabled.
http://www.netscan.org/ is a site which
actively scans the IPv4 address
space and mails network contacts with information on how to disable them.
http://www.powertech.no/smurf/ is
a site which will test scan your
network and allow you to enter a known smurf amplifier site.