Blocking MSN Messenger through MS Proxy 2.0

Hi,

I have a Winows 2000 Server (SP4) running IIS 5.0. I have installed MS Proxy Server 2.0 which is running Web, WinSOCK and SOCKS Proxy services. NTLM is enabled on the server.

Clients in the network (Win9x, Win NT/2000) use the Web and WinSOCK proxy services.

Please let me know the solution for the following two requirements:

1. I want to block MSN Messenger completely.
2. I want to block file transfer through MSN Messenger.

The configurations are desired to be done on the Proxy server only.

Regards,
Anindya.
mitra_amAsked:
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webtransConnect With a Mentor Commented:
the link below will surely work with you
it did work with me

http://nscsysop.hypermart.net/no_chat.html

Block Access to Login Servers via Proxy
The programs generally have options to connect behind a firewall by entering proxy information, such as HTTP, SOCKS, or other.  Some will pick up the proxy configuration information to try from Internet Explorer settings.  Blocking a connection through a proxy is generally pretty easy as all you have to do is enter the proper Deny URL rule.  Generally, the only proxy that will be used here is the HTTP Proxy, possibly the Transparent HTTP Proxy.

The key here is to deny whatever login server is called out in the configuration options for the chat program.  Some may show you a configurable entry, while others (like MSN Messenger) hide it.
Login server names - set up a Deny URL access rule for these sites
AOL Instant Messenger:  login.oscar.aol.com, possibly toc.oscar.aol.com and login.icq.com

MSN Messenger:  gateway.messenger.hotmail.com  (was login.gateway.hotmail.com)
ICQ:  login.icq.com and http.proxy.icq.com  (Was icq.mirabilis.com and login.icq.com previously)
Yahoo! Messenger:  msg.edit.yahoo.com/*

(Yahoo! Messenger:  Might also need to block messenger.yahoo.com/* andhttp.pager.yahoo.com/*  Be sure to type in the http on that last URL).
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