How to block yahoo messenger

[cipandales]

Hello !

Is there any chance to block yahoo messenger, even user choose for the connection type "behind the firewall" ?

I didn't found a working solution in this forum (at least for me).

Thank you !

[RBoynton]

Perhaps this will help:

http://www.helpbytes.co.uk/yconnect.php

You can also install the protocol control and select to block Yahoo Messenger.

[cipandales]

I am using protocol control to block Yahoo Messenger but doesn't work because all users choose for the connection type "behind the firewall".
I am using also for yahoo mail chat this (forums.untangle.com/web-filter-lite/9810-block-yahoomail-chating.html) and it is working just for mail chat.

Is there any working solution for yahoo messenger ?

Thank you