Re: N00b Question

[GABRY <gabrylst () gmail com>]

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