ODP: blocking ports

You can consider information from the book AS/400 Security Tips and Tools.
Krzysztof

-----Oryginalna wiadomosc-----
Od: Angela Wawrzaszek [mailto:wawrzaszeka@AUSTEEL.com]
Wyslano: 21 marca 2001 18:22
Do: Midrange Mail List (E-mail)
Temat: blocking ports


The instant messengers that come with many browsers like AOL create a
security problem.  We would like to block the use of instant messengers by
blocking the port through TCP/IP that they come in on.  Does anyone know how
to determine what port these messengers use?  Or any other way to prevent
use of these.   Monitoring that no one installs one on their PC would be a
nightmare,  and a full time job. 

Angie Wawrzaszek 
M.I.S. Department 

 

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