Re: [Full-Disclosure] ICMP Covert channels question

From: Andrew Farmer (andfarm_at_teknovis.com)
Date: 01/29/05

  • Next message: Gadi Evron: "Re: [Full-Disclosure] ICMP Covert channels question" 
    To: cyberpixl <cyberpixl@gmail.com>
Date: Fri, 28 Jan 2005 16:12:21 -0800

    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.

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  • Next message: Gadi Evron: "Re: [Full-Disclosure] ICMP Covert channels question"

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