Blocking Instant Messenger

sales@prowebdesignnj.com · Jul 17, 2004

DSoes anyone know what ports the I.M. programs use? I have an employee who connects to my server/network with her laptop. She has XP Pro and uses AOL I.M. and Yahoo I.M. to talk to her friends all day (on the sly). I need a way to block these programs from our server so that they can't be accessed. Any idea's?

TheDoug · Jul 17, 2004

5050 for Yahoo (server scs.yahoo.com), and 5190 for AIM (server login.oscar.aol.com).

bigbazza · Jul 17, 2004

Warn her in writing that her chat is being monitored and to "cease and desist". That might help, also. Careful, because of the litigious (sp?) mentality that rules in the USA. Baz

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sales@prowebdesignnj.com said:

DSoes anyone know what ports the I.M. programs use? I have an employee who connects to my server/network with her laptop. She has XP Pro and uses AOL I.M. and Yahoo I.M. to talk to her friends all day (on the sly). I need a way to block these programs from our server so that they can't be accessed. Any idea's?
Click to expand...

DavidGP · Jul 17, 2004

TheDoug said:

5050 for Yahoo (server scs.yahoo.com), and 5190 for AIM (server login.oscar.aol.com).
Click to expand...

to add to Doug's info some relevent info
http://infosecuritymag.techtarget.com/articles/february01/cover.shtml
about half way down ..... ports and IP ranges for IM apps

plus a handy port list
http://www.chebucto.ns.ca/~rakerman/port-table.html

DanTekGeek · Jul 17, 2004

you also might want to block aim.com and all subdomains. there is a thing called aim express that lets you log on without installing the program.

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Blocking Instant Messenger

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