C.4 How do I determine what service the port is for?
Since it is impossible to learn what port does what by looking in a list, how do i do it?
The old hands-on way of doing it is by shutting down nearly every
service/daemon running on your machine, doing
Another way, that needs more guess work, is simply telnetting to the
ports and see what comes out. If nothing comes out, try typing some
gibberish and slamming Enter a few times, and see if something turns
up. If you get binary garble, or nothing at all, this obviously won't
However, this will only tell you what listening ports are used. It won't tell you about dynamically opened ports that may be opened later on by these applications.
There are a few applications that might help you track down the ports used.
On Unix systems, there's a nice utility called
On windows systems, nothing comes preinstalled to assist you in this task. (What's new?) There's a utility called ``Inzider'' which installs itself inside the windows sockets layer and dynamically remembers which process opens which port. The drawback of this approach is that it can't tell you what ports were opened before inzider started, but it's the best that you'll get on windows (to my knowledge). http://ntsecurity.nu/toolbox/inzider/ .
include('phone.php') ?> include('address.php') ?>
|© 2000 - 2017 Vesaria Network Security Specialists|
|Call Us at include('phone.php') ?>|