One of the simplest and most effective things you can do is to output a list of the open connections to your system. In this article I will demonstrate a few of the things you can do to find out if someone else is hanging around your system. Whether it’s an obscure antivirus alert or a strange firewall notification, it’s a good idea to know what to do in this situation. When this type of thing happens it will often be the case that something might tip you off to the intruder’s presence. It’s 4 PM on a Thursday afternoon…do you know what ports you’re communicating on? One of the biggest fears for any systems administrator is that his/her machine has been compromised.
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