[plug] Getting around firewalls (Outgoing)

Mike Holland michael.holland at gmail.com
Thu May 14 10:58:38 WST 2009


W.Kenworthy wrote:

> For those really hard cases, there is an email tunnel (!)

What? You mean TCP/IP packets sent via email? Has that really been 
implemented?

More seriously, for really tough firewalls, the answer is NSTX.
TCP/IP over DNS.

DESCRIPTION
        nstxd  listens for well formed DNS requests and translates them 
into IP packets.  Responses are sent in
        the form of DNS replies. This allows clients to tunnel IP 
packets over the DNS protocol.


http://savannah.nongnu.org/projects/nstx/
http://slashdot.org/article.pl?sid=00/09/10/2230242

But for real work, as Adrian said, use a 3G phone or modem. It avoids
not only the network firewall, but the paperwork/politcial firewall to
get authority to connect your laptop to the LAN.

Mike




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