If you wish to block them, port numbers are not enough.
ICQ for one allows connection via normal http port 80.
The easiest thing to do is to block access to the appropriate
login servers.
Cheers,
Phil
P.S. Have you tried using a search engine to find the answers?
---------------------------------------------
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: 28 March 2001 10:58
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED];
> '[EMAIL PROTECTED]'
> Subject: Port numbers
>
>
>
> dear all,
>
> anybody who knows the port number used by instant messengers (icq,
> irc,msn,yahoo, aol.....)
>
>
> thanks!
>
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>
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