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Covert Channel: ASCII Art Over ICMP

Posted by michael on from the help-i'm-trapped-inside-a-chinese-fortune-cookie-factory dept.

An anonymous reader writes "Have you ever had a particularly lossy Cisco ping, which you were sure was trying to tell you something? I mean, really *tell* you something. Echoart allows you to return a simple ascii art image in response to a Cisco-style ping."

1 of 147 comments (clear)

  1. Did this on port 23, once.. sort of. by Xzzy · · Score: 5, Interesting

    I did up a silly perl script, using curses, that ran an ascii art animation of stick figure A throwing a grenade at stick figure B.

    I, the guy that owned the machine, was figure A. The guy trying to telnet to my machine was figure B. After figure B was reduced to a crater I printed some message along the lines of "you aren't welcome here, go away".

    Ran it out of hosts.deny and left it up for quite a while. I was bored, sounded more fun than setting up a firewall like I should have. ;)

    It worked surprisingly well, even with the windows telnet client.