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Message-ID: <712d8d5668e9c41160ae3fe7896cc25e@teknovis.com> From: andfarm at teknovis.com (Andrew Farmer) Subject: ICMP Covert channels question On 28 Jan 2005, at 14:45, cyberpixl wrote: <snip> > Assume there is a local machine (our target) with ip 192.168.0.2 that > is connected to the internet using a router 192.168.0.1/88.88.88.88 > (that is not blocking icmp packets) and my machine is say, > 33.33.33.33. If i then send an icmp packet to the 88.88.88.88 router > with source ip set to 192.168.0.2, would it forward that packet to the > host in its local network, or will it discard it? Depends entirely on the router's configuration. Most will forward it; however, some will, whether out of misimplementation or paranoia, drop it. > Is there any way to deliver my packet to that local machine? There are some other nifty tricks you ought to check out. For example, take a look at LimeWire's 'UDPConnect' protocol. -------------- next part -------------- A non-text attachment was scrubbed... Name: PGP.sig Type: application/pgp-signature Size: 186 bytes Desc: This is a digitally signed message part Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20050128/d85b642d/PGP.bin
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