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A question that is often asked is Why the hell do we have so many ports? Nobody is ever going to use all 63-thousand of them, so why so many? And which ones are useful? Mostly, if you’re reading this then you will be looking for something to exploit, something with less then perfect security. In that case, you don’t need to know what’s on every port, just what runs on the common ones.

First of all, the bad port: 554. I have no idea what runs on it, some Microsoft radio service. It’s not something that can be exploited, but if given the chance and included in a port scan it will take valuable time to resolve, all for a useless piece of information.

The good ports are much more interesting: Port 80 means that either the victim has a webserver or an unsecured router – fun. port 25 indicates an FTP server, which often goes paired with the unsecured router. Anything running on port 23 is fun, because port 23 is telnet. If you find something running a telnet server, try youre hardest to get in, because telnet will allow you greater control of the victims computer then any other system – broadly speaking . Note, however that telnet can sometimes be used as a command line only router configuration tool, in which case it becomes useless for hacking purposes.

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