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Port Knocking in Action

Posted by CmdrTaco on from the crazy-security-through-obscurity dept.

tyldis writes "There was something called "port knocking" mentioned on Slashdot earlier, and now an implementation has sprung to life. Is this something worth pursuing?" The page is to an application called knockd which is a simple proof of concept with hard coded knock sequences. Really interesting stuff.

8 of 430 comments (clear)

  1. How do you transcribe... by JesseL · · Score: 5, Funny

    "shave and a haircut" into port numbers?

    --
    "Prefiero morir de pie que vivir siempre arrodillado!"
    1. Re:How do you transcribe... by winkydink · · Score: 4, Funny

      I dunno. How many ports can you knock on with two bits?

      --

      "I'd rather be a lightning rod than a seismometer." -Ken Kesey

    2. Re:How do you transcribe... by Hanji · · Score: 4, Funny
      $perl -e 'print join(",",unpack("s*","shave and a haircut"))."\n"'
      29544,24950,25888,24942,25632,24 864,26721,26994,25461
      Q-BASIC, BAH
      --
      A Minesweeper clone that doesn't suck
  2. Knock Knock by Anonymous Coward · · Score: 4, Funny

    You can keep on knockin' but ya can't come in

  3. old by ozric99 · · Score: 5, Funny
    When the server detects a specific sequence of port-hits, it runs a command defined in its configuration file. This can be used to open up holes in a firewall for quick access.

    pfft, XP has had this for ages....

  4. Knock Knock by Anonymous Coward · · Score: 5, Funny

    Who's there?

    Packet.

    Packet who?

    Packet up bitch, you've been hacked.

  5. Re:one of many by Anonymous Coward · · Score: 4, Funny

    Actually I counted 11 other port knocking implementations. Really I did. Can I get modded +4 also?

  6. So there I was by ch-chuck · · Score: 4, Funny

    I'd just scp'd a new file to my ISP, ssh'd in to edit index.html, checked email, and then when I refreshed the page in http, suddenly I has root access!

    --
    try { do() || do_not(); } catch (JediException err) { yoda(err); }