See What Ports are Open on Your Computer and What is a Port Number?-Updated

TCAT Shelbyville - Technical Blog

Why is it important to know what ports are open on your computer?  Ports are associated with specific services.  For example- if you open up the internet and type a virtual port opens in your network services to allow your computer to go out to the internet.   That port is 80.  If web servers are installed, they have this port open and any firewalls they are behind must have this port open.  On hardware firewalls, this computer is plugged into the DMZ (usually a port that says optional / DMZ).

Port numbers are like doors on your house.  These doors can be locked or open for people to come into.  Firewalls are the locks on your computer, locking these doors and preventing access.  What are some of the common port numbers and what services / programs use these?

  • 7    Ping  also known as ICMP or ECHO  How do you use…

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About TCAT Shelbyville IT Department

The Tennessee College of Applied Technology - is one of 46 institutions in the Tennessee Board of Regents System, the seventh largest system of higher education in the nation. This system comprises six universities, fourteen community colleges, and twenty-six Applied Technology Colleges.
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