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  1.  Home
  2. MIDRANGE-L
  3. March 2001

RE: blocking ports

I believe that AIM uses ports 5190-5193.  However, there seems to be some stories of AIM using port 80 when it cannot access the 5190-5193 range!

 

Scott S. Robertson

Information Systems Manager

Data Processing Sciences Corp.

srobertson@dpsciences.com

http://www.dpsciences.com/

 

 

-----Original Message-----
From: Angela Wawrzaszek [mailto:wawrzaszeka@AUSTEEL.com]
Sent: Wednesday, March 21, 2001 12:22 PM
To: Midrange Mail List (E-mail)
Subject: 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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