Re: Stop yahoo messenger

[Hasan Diwan <hdiwan@hasandiwan.net>]

	As long as the instant message architecture operates on a single point
of failure architecture, as illustrated below:
a----         -----e
     \       /
b----->login<------f
     /       \
c----         -----g
	You need only to find out the host that acts as "login" in the above
diagram and you break the whole system. Perhaps a tcpdump would help in
figuring out what to block it. You might also want to try finding a protocol
description of how Yahoo messenger communicates (I had found one, I've lost it
since).

On Sun, May 05, 2002 at 11:25:14AM -0400, Steve Shockley wrote:
> Like most instant messengers today, Yahoo Mesenger will scan other ports if
> it finds that its default port is blocked.  It also will work through an
> http proxy.  If you really want to block it, about your only choice is to
> block all of the Yahoo netblocks by IP address, which of course will also
> block web access.  The other option of course is to just watch for Yahoo
> Messenger packets/connections, then walk over and uninstall it for the user.
> If you want to get complicated, you could even write a script to watch for
> YM connections, then block that user's Internet access for a half hour.

-- 
Hasan =)
OpenPGP KeyID: 0xBE42DCA6
Fingerprint: 1CB0 47E3 0A24 DAC1 DCCA  4225 F166 40C2 BE42 DCA6

[demime 0.98d removed an attachment of type application/pgp-signature]