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至顶网网络频道Telnet Protocol-a proposed document(4)

Telnet Protocol-a proposed document(4)

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    至顶头条

TELNET is a third-level protocol, the function of which is to make a terminal (or process) at a using site appear to the system or a process at a serving site as logically equivalent to a terminal "directly" connected to the serving site.

作者:论坛整理 来源:ZDNet网络安全 2007年12月27日

关键字: telnet命令 opentelnet linux telnet telnet入侵 telnet telnet端口

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  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 1 | 1 | 0 | 14 | S0 | RS | . | >| N | ^ | n | ~ |

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  | 1 | 1 | 1 | 1 | 15 | S1 | US | / | ? | O | _ | o |DEL |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  Code Structure 8 7 6 5 4 3 2 1

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  +---------------------------+----+----+----+----+----+----+----+----+

  |\ b8 -> | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |

  | \ b7 -> | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |

  | \ b6 -> | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |

  |B \ b5 -> | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 |

  | I +---+---+---+---+------+----+----+----+----+----+----+----+----+

  + T | b | b | b | b |\COL->| | | | | | | | |

  \ S| 4 | 3 | 2 | 1 | \ | | | | | | | | |

  \ | | | | | |\ | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |

  \ | | | | | | | | | v \ | | | | | | | | |

  \ | v | v | v | v |ROW \ | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 0 | 0 | 0 | 0 |'80'| |'A0'| | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 0 | 0 | 1 | 1 |'81'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 0 | 1 | 0 | 2 |'82'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 0 | 1 | 1 | 3 |'83'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 1 | 0 | 0 | 4 |'84'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 1 | 0 | 1 | 5 |'85'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 1 | 1 | 0 | 6 |'86'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 0 | 1 | 1 | 1 | 7 |'87'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 0 | 0 | 0 | 8 |'88'| | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 0 | 0 | 1 | 9 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 0 | 1 | 0 | 10 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 0 | 1 | 1 | 11 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 1 | 0 | 0 | 12 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 1 | 0 | 1 | 13 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 1 | 1 | 0 | 14 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  | 1 | 1 | 1 | 1 | 15 | | | | | | | | |

  +---+---+---+---+------+----+----+----+----+----+----+----+----+

  'XX' = HEX designation for codes assigned to TELNET Control Signals.

  Figure 3. Official Network Virtual Terminal Code

  [This RFCwas put into machine readable form for entry]

  [into the online RFCarchives by Sergio Kleiman, 8/01] 

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