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ports used by popular applications

Posted on 2000-03-29
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Last Modified: 2010-04-11
Can you help me get a list of the ports used by applications such as ICQ, Real player and all other internet applications.

And how opening up of these ports can risk the security of an intranet in a company?
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Question by:java_lover
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by:jjeff1
ID: 2668868
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by:jjeff1
ID: 2668870
Oops, the name of the software you want is superscan. It has a huge lists of ports.
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cujavia earned 150 total points
ID: 2670093
Start with your computer and open Services file (no extension) in your Windows directory, eg. C:/Windows/Services

A bit more you can find in NT Server Resource Kit (Networking Guide - Appendix B)

Still more, search Internet for RFC (Request For Comments), Services file refers to RFC 1060, but I believe that standard has been updated since.

Hope it helps.
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Expert Comment

by:cujavia
ID: 2670174
Sorry, missed second portion of your question. Concerned about security? obviously your intranet is already connected to the Internet and likely you have some sort of protection implemented. It shouldn't greatly increase the risk if done properly.

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Expert Comment

by:cujavia
ID: 2678793
Check it out, recently came across the following:
http://www.isi.edu/in-notes/iana/assignments/port-numbers
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