Question

How to block MSN Messenger?

Asked by: Balack

This is a Windows 2003 AD domain. At the moment, no firewall was deployed. My company comes out a new policy to block all users to use MSN. Is there a way to achieve this?

Can gpo block it?

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Asked On
2009-03-12 at 23:56:44ID24226838
Topic

Chat / IM Software

Participating Experts
3
Points
500
Comments
6

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Answers

 

by: MushqPosted on 2009-03-13 at 00:07:14ID: 23876688

The only way i found to block msn is to block the ports listed above and block IP address of all msn services.

There are a LOT of ip address that msn will try to use.

207.68.172.237 is one i'm using at the moment so blocking 207.68.*.* should stop that.

Next try conencting again and if it's differnt try blocking all of the range of the ip that allowed you to conenct with.

Use netstat -a to help you.


Also try blocking 64.4.*.*

Yes, you're blocking a lot of IP's but a large percentage of them belong to microsoft ( hotmail,msn,msn messager...etc )


Please check this http://www.experts-exchange.com/Security/Firewalls/Q_20610865.html for more details

 

by: synergiqPosted on 2009-03-13 at 01:57:08ID: 23877116

Easiest way to do this, is by blocking it inside of Group Policy. Stop the app from even being loaded. Works a treat :)

 

by: synergiqPosted on 2009-03-13 at 01:58:09ID: 23877123

 

by: NicoJuicyPosted on 2009-03-13 at 02:03:44ID: 23877148

Block the port msn uses.
So if they try to install it, it won't connect.

(port  number 1863 or 443 should be disabled for MSN Messenger service).

Also, block the online msn websites like http://webmessenger.msn.com/

Hope this helps.

 

by: synergiqPosted on 2009-03-13 at 03:31:45ID: 23877537

You can't block 443 and it's used for HTTPS... so wouldn't be the wisest thing to do. Especially on a 2003 domain.

Your best port of call is to use some decent web filtering software/hardware (I recommend the Barracuda Solution - http://www.barracudanetworks.com/ns/?L=en_emea) along with a decent GPO setup.

Also, nothing can beat a good web usage policy, any member of staff caught on inappropriate websites/programs is liable to disiplinary action.

 

by: BalackPosted on 2009-03-13 at 21:34:53ID: 23885432

How about blocking msn messenger if I am having windows 2008 ad domain. Does gpo help?

20120131-EE-VQP-002

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