HSS Probe (SE)|
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A program I did a long time ago, so please bear in mind that this does not reflect the quality of my current works. In fact the GUI is pretty bad. What this program does, is let you scan an IP address or range for open ports at very high speeds. Typically you would run this against your own machine (not from Localhost, but from another PC) so you could see if you have any ports open. It also knows about approximately 80 trojan ports, and will let you know if any open ports are suspected to be of the trojan type. There was supposed to be a Professional version of this, but I never got around to doing it.