On Tue, 2006-01-17 at 16:23 -0500, C F wrote: > Speaking of ssh tunneling, current issue of 2600 (www.2600.com) has a > very interesting idea on Tunneling over ICMP. The author of the > article has written a program to do it, mainly for bypassing payment > on wifis that charge, since they usualy leave ICMP alone. Here is a > link: > http://www.cs.uit.no/~daniels/PingTunnel/ >
DNS is an older means by which this has been implemented. There was even a live demo of streaming music over a dns tunnel. ICMP can be blocked far more easily than DNS since only some protocols (HTTP for example) will work proxied via standard means. Using ICMP as a covert data channel is over a decade old (check bugtrack archives about a decade ago). Not saying this is not useful, just that its not new by any means. -- Trixter http://www.0xdecafbad.com Bret McDanel UK +44 870 340 4605 Germany +49 801 777 555 3402 US +1 360 207 0479 or +1 516 687 5200 FreeWorldDialup: 635378 http://www.sacaug.org/ Sacramento Asterisk Users Group
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