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Re: N00b Question
From: GABRY <gabrylst () gmail com>
Date: Fri, 31 Dec 2004 01:52:26 +0200

MSN Messenger ports 1863 , 6901, 6891-6900 


On Thu, 30 Dec 2004 15:45:36 -0500, Idol Crash <idolcrash () gmail com> wrote:
AFAIK, I think that the only way to block web-based e-mail would be
through a proxy or host file, as to block it through a firewall, one
would have to block port 80, used for all web viewing, which isn't
very practical.  For MSN and Yahoo chat, you'd have to find the ports
for which they are typically used and block them (I don't know them
off the top of my head), and prevent users from installing said
applications.

Good luck, and I hope this was helpful.

On Thu, 30 Dec 2004 11:41:51 -0500, Harshal Dedhia
<harshal.dedhia () skybird-travel com> wrote:
Hi,
I am very new to the firewall and network security world. I have a
situation wherein  I need to block webbased email access and the ability
to upload attachments to web-based email. I also need to ensure that
MSN/yahoo chat is disabled and quotas are established for web surfing.

Is there an Open Source solution to this problem. The network comprises
Cisco Routers and 500 series firewalls.

Cheers!
Harshal





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