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Re: [FW-1] MSN and Yahoo messenger



yes and block port 80 incase someone inadvertently uses the "world wide web"
as this can pass viruses too, in fact best practise, unplug your "internet
router".



> -----Original Message-----
> From: Mailing list for discussion of Firewall-1
> [mailto:[email protected]]On Behalf Of Joe
> Pampel
> Sent: 06 June 2002 21:28
> To: [email protected]
> Subject: Re: [FW-1] MSN and Yahoo messenger
>
>
> You should not under any circumstance let these through IMHO.
> They present a real threat to your network.
> There have been several IM spread virus outbreaks already and
> just today CERT issued a bulletin about
> the Yahoo product. If people have to IM, either try and get a
> professional-grade product with encryption and logging
> in place or have them use the web-based AIM product which
> does not, as far as I know, allow the remote launching of
> apps and file downloads, etc.
> I realize this doesn't answer your question, but it's IMHO
> very important to understand the risks involved and make sure
> that management does as well so the decision to let it
> through does not come back to haunt you. My prediction FWIW
> is that this is going to get worse before it gets better.
>
> GD LK
>
> Joe
>
> >>> Ken Chan <[email protected]> 06/06/02 04:27AM >>>
> Dear all,
>
> Can someone tell me how to let MSN and Yahoo messenger pass
> through the
> firewall.
> How to add these two services.
>
> Thanks.
>
> Regards,
> Ken
>
> ********************************************************
> Ken Chan           Email: [email protected]
> Tel: (852) 2608 6226     Fax: (852) 2608 6566
> Automated Systems (HK) Ltd.
> Software Division - System Services
> ********************************************************
>
>
>
>
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