Do you allow SecureHTTP (HTTP+SSL, usually port 433) through your
firewall? If so, you wont be able to inspect it. Do you do stateful
inspections of all your emails? All your Usenet posts? Do you
monitor all your telnet sessions character by character?
-derek
Ron Peterson <[EMAIL PROTECTED]> writes:
>
> Derek Atkins wrote:
> >
> > If you allow any real-time protocol through your firewall, someone can
> > tunnel through it. It's a fact of life. If you allow telnet, ssh,
> > http, even nntp or smtp, it can be used to tunnel another protocol.
> > If you want to disable tunneling, unplug yourself from the 'net. If
> > that isn't an option, then you're going to have to use social means to
> > prevent people from doing it.
>
> Or stateful inspection tools. Which is what I was asking about.
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL N1NWH
[EMAIL PROTECTED] PGP key available
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