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Re: Blocking MSN Messenger

On Tuesday, June 25, 2002, at 10:05 AM, Grant Wray wrote:

> You can set up an access control list on the cisco router.
> Grant/
>
>

Access control list? I have seen this referenced quite a couple of
times now, but don't have much of an idea of what it is about. Actually,
I do have an idea, it's about blocking or allowing desired connections
on a rule basis, much like a firewall. What I don't know is how it is
done, what the commands and/or syntax is.

Anywhere I could look for info and tutorials on this?

Thanks for your time and suggestion. Sincerely,...


Juan.

> -----Original Message-----
> From: Juan Manuel Palacios [mailto:email@hidden]
> Sent: 25 June 2002 14:58
> To: Mac OS X Server Mailing List
> Subject: Blocking MSN Messenger
>
>
> Hello everybody. Does anyone have any idea what ports MSN
> Messenger
> uses to communicate? My network users keep on using it outside leisure
> hours so my employers came to the conclusion that it use needs to be
> blocked, at least during work hours.
>
> So my basic questions here are, apart from what port it uses,
> how
> to achieve this with Mac OS X Server's built in firewall if the box is
> only another host in the network? The network routes through a Cisco
> router providing DSL connectivity and my MOSXS box is just a file
> server, so I don't know how to make it filter the IP packets if the
> other hosts are not routing through it. And also, how can I implement a
> rule and take it down at separated time intervals? What I want is for my
> network users to be able to chat at lunch time and after the work day is
> over, but not during work time. So I need some kind of automatization on
> an IP filtering rule that has to come down at a certain hour and then
> back up. How could I achieve this?
>
> Thank you very much. Sincerely,...
>
>
> Juan.
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