Security Basics mailing list archives

Re: One computer two different networks


From: Ansgar -59cobalt- Wiechers <bugtraq () planetcobalt net>
Date: Mon, 16 Oct 2006 00:15:58 +0200

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.

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

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