Re: One computer two different networks

[Ansgar -59cobalt- Wiechers <bugtraq () planetcobalt net>]

On 2006-10-16 Hagen, Eric wrote:
> On Sunday, October 15, 2006 4:16 PM Ansgar -59cobalt- Wiechers wrote:
> > On 2006-10-12 Hagen, Eric wrote:
> > > I read it as a stricly recieve-only solution.  For example, it could
> > > be desirable to recieve incoming UDP data streams, while maintaining
> > > NO possibility for return traffic.
> > >
> > > However, TCP (and therefore, 99% of Internet application usage)
> > > would be impossible by its nature of requiring two-way
> > > communication.
> >
> > A "receive-only" solution isn't quite possible from a network PoV,
> > not only for TCP, but for UDP and other protocols as well. If you
> > allow only inbound traffic, then how are you going to send out the
> > initial request? If you allow only outbound traffic, then you can
> > send the initial request, but won't be able to retrieve the data.
>
> You don't need an "initial request".  The intention of the device is
> to recieve known traffic, inbound only.
>
> The "initial request" is likely a phone call or a personal visit to
> "aim" the sender at your super-secret-secure network.

You may want to explain how you define what is or isn't "known traffic"
and how the inbound transfer is initiated, because you cannot possibly
suggest to allow arbitrary content to be pushed into a supposedly secure
network.

Yes, there may be situations where you have just an inbound data stream,
but their number is rather few, and the description of the OP did not
sound like he had any such situation.

Regards
Ansgar Wiechers
-- 
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq

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