Sorry for the recent influx of computer related questions, but I am having zero luck with google searches, PC websites, and newsgroups. You people have been the most informative resource I have found. This coming school year, I will have to work on a year-long science project, and for part of mine, I want to test a variety of firewalls and computers without firewalls. I have figured out how to ping a computer via a command line prompt, but I have no idea how to attempt to access system internet ports (i.e., port 80, etc.). I would like to this so that I could test how easily one can access these ports and what damage could be done by this attack. So, my question is, if I network two or more computers, could I use one to simulate an Internet attack on another, thus testing the firewall and/or taking control of the other system? Is this even technologically possible, or is it illegal, and thus there is no software available?