[defaultmike]

Does anyone have a clue of how to block MSN on OS X?
All help is appreciated.

[defaultmike]

I'm thinking its something in the system preferences, but I don't really know

[Brad]

You could set up a firewall rule to do this. You'll need to know what ports it uses, though.

Or you could set up a limited account on the computer that doesn't allow access to the application.

It depends on the setup you're working with. Where is it you're trying to do this? Why are you doing it?

[defaultmike]

my boss want to set it up at the ad agency where I work. Since I'm the only employee that really knows something about computers, he asked for my help. I kindda figured the firewall thing, but its outta my league to try and do something like this. Oh well, screw him! :P

[Bryson]

Do you mean MSN Messenger? It sounds like you do. Because it'll be quite different.

[_Ω_]

If you go into System Prefs/Sharing and look for the Firewall tab you can add ports to block.

If you click on the New option, one of the options is MSN Messenger which uses ports 6891-6900.

This what you looking for?

Note: I am still running Panther so it may have changed

[Brad]

Originally Posted by Omega If you go into System Prefs/Sharing and look for the Firewall tab you can add ports to block.

Actually, that dialog is to allow ports. By default, when you turn on the firewall all ports are denied. Of course, by the implementation there, only incoming ports are blocked. Outgoing are not. You'll need to fire up BrickHouse or another front end to the built-in firewall to block outgoing ports.