`_
.. code-block:: shell
telnetlib3-fingerprint --loglevel=debug 140.114.87.5 443
bbs.cs.nthu.edu.tw:23
---------------------
**Connection Banner:**
.. raw:: html
歡迎光臨【 楓橋驛站 】140.114.87.5 ☉ 清大資工 ☉線上有 [6] 片楓葉
▄e▄▄e█ee ┌─┐ ┬ ┌┬┌┬┬┐
ee▇▇▇▇e█ █e 木│─│ 大 ├┼└┼┼┘ ├┐
▌e███████e██e ╯虫└╯ 木┌─┐ ├┼ ─┬─ 立┌┴┐
█▌███████▌██e │口┘ └┴┐ ┼ └─┘
▌█▌██████████▌▌裺 ′′ ╯ ┼
▌█e██████▄███▌e ˙﹒．·歡迎光臨
▌██▄████e███e█▌ ˙﹒．·歡迎光臨
▌████████e▄▄██e ˙﹒．·歡迎光臨
▌█████▄e▄█▄▄█e
▌e██e▄█e███▄▌
eeeeee█e▌███▌e█e
▄██e██████ ██▍ e██e e██e
▌██▄▄e██e▌█▄ ████i ████i
e████▄ee█▄ █████i █████i
e▄e▇██ee ████i ████i
eei████▌ee 炎i█ 炎i█
wfyoy telnet://bbs.cs.nthu.edu.tw
[您的帳號]
※ 參觀帳號：guest 申請新帳號：new
.. raw:: html
bbs.cs.nthu.edu.tw:23
Encoding
~~~~~~~~
- **Effective encoding**: big5
- **Override**: big5 (from bbslist.txt)
- **Scanner detected**: big5
Telnet Fingerprint
~~~~~~~~~~~~~~~~~~
:ref:`6765e0c939dd0e6c... `
*This fingerprint is shared by 13 other servers.*
**Options offered by server**: ``ECHO``, ``SGA``
**Options requested from client**: ``NAWS``, ``TTYPE``
**Data source**: `6765e0c939dd0e6c/f54158c9efd919ce.json `_
The complete JSON record collected during the scan,
including Telnet negotiation results and banner data.
.. code-block:: json
{
"server-probe": {
"fingerprint": "6765e0c939dd0e6c",
"fingerprint-data": {
"offered-options": [
"ECHO",
"SGA"
],
"probed-protocol": "server",
"refused-options": [
"AARDWOLF",
"ATCP",
"BINARY",
"CHARSET",
"COM_PORT",
"EOR",
"GMCP",
"MSDP",
"MSP",
"MSSP",
"MXP",
"STATUS",
"ZMP"
],
"requested-options": [
"NAWS",
"TTYPE"
],
"scan-type": "quick"
},
"session_data": {
"banner_after_return": "\r [\u60a8\u7684\u5e33\u865f] \u001b[7m \u001b[m\u001b[24;15H",
"banner_before_return": "\u001b[;H\u001b[2J\u001b[1;40m\u6b61\u8fce\u5149\u81e8\u3010\u001b[33m \u6953\u6a4b\u9a5b\u7ad9 \u001b[37m\u3011140.114.87.5 \u2609 \u6e05\u5927\u8cc7\u5de5 \u2609\u7dda\u4e0a\u6709 [\u001b[33m6\u001b[37m] \u7247\u6953\u8449 \u001b[m\n\r\u001b[m \u001b[m\n\r \u2584\u001b[47m\ufffd\u001b[31me\u2584\u2584\ufffd\u001b[37me\u2588\ufffd\u001b[me\ufffd\u001b[30me\u001b[m \u001b[1m\u250c\u2500\u2510\u001b[31m\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\u001b[m \u001b[1m\u252c\u001b[m \u001b[1;31m\ufffd\ufffd\u001b[37m\u250c\u252c\u250c\u252c\u252c\u2510\u001b[31m\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\u001b[m\n\r \ufffd\u001b[47me\u001b[31m\ufffd\u001b[41me\u2587\u2587\u2587\u2587\ufffd\u001b[47me\u001b[37m\u2588\u001b[30m \u001b[m\u2588\ufffd\u001b[30me\u001b[m \u001b[1m\u6728\u2502\u2500\u2502\u001b[m \u001b[1m \u001b[m \u001b[1m\u5927\u001b[m \u001b[1m\u251c\u253c\u2514\u253c\u253c\u2518\u001b[m \u001b[1m \u251c\u2510\u001b[31m\ufffd\ufffd\u001b[m\n\r \u001b[30;47m\u258c\u001b[37m\ufffd\u001b[31me\u2588\u2588\u2588\u2588\u2588\u2588\u2588\ufffd\u001b[37me\u001b[m\u2588\u2588\ufffd\u001b[30me \u001b[m \u001b[1;31m\ufffd\ufffd\u001b[37m\u256f\u866b\u2514\u256f\u001b[m \u001b[1m\u6728\u250c\u2500\u2510\u001b[m \u001b[1m\u251c\u253c\u001b[m \u001b[1m\u2500\u252c\u2500\u001b[m \u001b[1m\u7acb\u250c\u2534\u2510\u001b[31m\ufffd\ufffd\u001b[m\n\r \u001b[47m\u2588\u001b[41m\u258c\u001b[31m\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u001b[47m\u258c\u001b[37m\u2588\u2588\u001b[31;41m\ufffd\u001b[47me\u001b[m \u001b[1;31m\ufffd\ufffd\u001b[m \u001b[1m\u2502\u53e3\u2518\u001b[m \u001b[1m\u2514\u2534\u2510\u001b[m \u001b[1m\u253c\u001b[m \u001b[1m\u2514\u2500\u2518\u001b[31m\ufffd\ufffd\u001b[m\n\r \u001b[30;47m\u258c\u001b[37m\u2588\u001b[41m\u258c\u001b[31m\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u001b[37m\u2588\u2588\u2588\u258c\u001b[m\u258c\u001b[1;31m\ufffd\u88fa\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\u001b[m \u001b[1m\u2032\u2032\u001b[m \u001b[1m\u256f\u001b[m \u001b[1m\u253c\u001b[m \u001b[1;31m\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\u001b[m\n\r \u001b[31;47m\u258c\u001b[37m\u2588\ufffd\u001b[41me\u001b[31;47m\u2588\u2588\u2588\u2588\u2588\u2588\u001b[37;41m\u2584\u2588\u2588\u2588\u258c\u001b[31;47m\ufffd\u001b[30;40me\u001b[m \u02d9\ufe52\uff0e\u00b7\u6b61\u8fce\u5149\u81e8\n\r \u001b[31;47m\u258c\u001b[37m\u2588\u2588\u001b[41m\u2584\u001b[31m\u2588\u2588\u2588\u2588\u001b[37m\ufffd\u001b[47me\u2588\u2588\u2588\ufffd\u001b[1;30me\u2588\u001b[;31;40m\u258c\u001b[m \u001b[1m\u02d9\ufe52\uff0e\u00b7\u6b61\u8fce\u5149\u81e8\u001b[m\n\r \u001b[30;41m\u258c\u001b[37m\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u001b[47m\ufffd\u001b[1;30me\u2584\u2584\u2588\u2588\u001b[;30;47m\ufffd\u001b[40me\u001b[m \u001b[1;30m\u02d9\ufe52\uff0e\u00b7\u6b61\u8fce\u5149\u81e8\u001b[m\n\r \u001b[30;41m\u258c\u001b[m\u2588\u2588\u2588\u2588\u001b[47m\u2588\u001b[1;30m\u2584\ufffd\u001b[;31;47me\u2584\u001b[1;30;40m\u2588\u001b[;31;47m\u2584\u2584\u001b[1;30;40m\u2588\u001b[;37;47m\ufffd\u001b[me\n\r \u001b[31;47m\u258c\u001b[37m\ufffd\u001b[1;30me\u2588\u2588\u001b[;37;47m\ufffd\u001b[33me\u001b[41m\u2584\u2588\u001b[43m\ufffd\u001b[30me\u001b[33m\u2588\u001b[40m\u2588\u001b[41m\u2588\u2584\u001b[31;47m\u258c\u001b[m\n\r \u001b[30m\ufffd\u001b[47me\u001b[37m\ufffd\u001b[31me\ufffd\u001b[41me\u001b[33m\ufffd\u001b[43me\ufffd\u001b[30me\ufffd\u001b[33me\u2588\ufffd\u001b[40me\u001b[30;43m\u258c\u001b[33m\u2588\u2588\u2588\u001b[31;40m\u258c\u001b[33;43m\ufffd\u001b[40me\u2588\ufffd\u001b[30me\u001b[m\n\r \u001b[30;41m\u2584\u001b[33m\u2588\u2588\u001b[40m\ufffd\u001b[43me\u2588\u2588\u2588\u2588\u2588\u2588\u001b[m \u001b[33;43m\u2588\u2588\u001b[40m\u258d\u001b[m \u001b[33m\ufffd\u001b[43me\u2588\u2588\u001b[31;41m\ufffd\u001b[40me\u001b[m \u001b[33m\ufffd\u001b[43me\u2588\u2588\u001b[32;42m\ufffd\u001b[40me\u001b[m\n\r \u001b[30;43m\u258c\u001b[33m\u2588\u2588\u001b[31m\u2584\u2584\u001b[33;41m\ufffd\u001b[43me\u2588\u2588\ufffd\u001b[30me\u258c\u001b[33m\u2588\u001b[30m\u2584\u001b[m \u001b[33m\u2588\u001b[31m\u2588\u001b[33m\u2588\u2588\u001b[31m\ufffd\u001b[33mi\u001b[m \u001b[33m\u2588\u001b[32m\u2588\u001b[33m\u2588\u2588\u001b[32m\ufffd\u001b[33mi\u001b[m\n\r \u001b[30;43m\ufffd\u001b[33me\u2588\u2588\u2588\u2588\u001b[31m\u2584\ufffd\u001b[30;41me\u001b[33;40m\ufffd\u001b[43me\u2588\u001b[30m\u2584\u001b[m \u001b[33m\u2588\u2588\u2588\u001b[31m\u2588\u001b[33m\u2588\ufffd\u001b[31mi\u001b[m \u001b[33m\u2588\u2588\u2588\u001b[32m\u2588\u001b[33m\u2588\ufffd\u001b[32mi\u001b[m\n\r \u001b[33m\ufffd\u001b[34;43me\u001b[33;41m\u2584\ufffd\u001b[43me\u2587\u001b[40m\u2588\u001b[43m\u2588\u001b[34;44m\ufffd\u001b[43me\u001b[30m\ufffd\u001b[40me\u001b[m \u001b[33;43m\u2588\u001b[31m\u2588\u001b[33m\u2588\u2588\ufffd\u001b[31mi\u001b[m \u001b[33;43m\u2588\u001b[32m\u2588\u001b[33m\u2588\u2588\ufffd\u001b[32mi\u001b[m\n\r \u001b[33m\ufffd\u001b[34;43me\u001b[33;44m\ufffd\u001b[43me\u001b[44m\ufffd\u001b[43mi\u2588\u2588\u2588\u2588\u001b[41m\u258c\u001b[44m\ufffd\u001b[34me\u001b[47m\ufffd\u001b[40me\u001b[m \u001b[30m\ufffd\u001b[m\u708ei\u2588\ufffd\u001b[30m\ufffd\u001b[m \u001b[30m\ufffd\u001b[m\u708ei\u2588\ufffd\u001b[30m\ufffd\u001b[m\n\r \u001b[1;30;42m wfyoy\u001b[;37;42m \u001b[30mtelnet://bbs.cs.nthu.edu.tw\u001b[37m \u001b[m\n\r\u001b[m\u001b[24;1H [\u60a8\u7684\u5e33\u865f] \u001b[7m \u001b[m\n\r \u203b \u53c3\u89c0\u5e33\u865f\uff1a\u001b[1;32mguest\u001b[m \u7533\u8acb\u65b0\u5e33\u865f\uff1a\u001b[1;31mnew\u001b[m\u001b[24;15H",
"encoding": "big5",
"option_states": {
"server_offered": {
"ECHO": true,
"SGA": true
},
"server_requested": {
"NAWS": true,
"TTYPE": true
}
},
"scan_type": "quick",
"timing": {
"probe": 0.5048227310180664,
"total": 5.291757583618164
}
}
},
"sessions": [
{
"connected": "2026-02-09T19:28:49.158010+00:00",
"host": "bbs.cs.nthu.edu.tw",
"ip": "140.114.87.5",
"port": 23
}
]
}
Connection Log
~~~~~~~~~~~~~~
Debug-level log of the Telnet negotiation session,
showing each IAC (Interpret As Command) exchange
between client and server.
.. code-block:: text
DEBUG client.py:863 Fingerprint client: host=bbs.cs.nthu.edu.tw port=23
INFO client_base.py:174 Connected to
DEBUG stream_writer.py:706 recv IAC DO TTYPE
DEBUG stream_writer.py:1767 handle_do(TTYPE)
DEBUG stream_writer.py:3167 pending_option[WILL + TTYPE] = True
DEBUG stream_writer.py:947 send IAC WILL TTYPE
DEBUG stream_writer.py:3167 pending_option[SB + TTYPE] = True
DEBUG stream_writer.py:3167 local_option[TTYPE] = True
DEBUG stream_writer.py:3167 pending_option[WILL + TTYPE] = False
DEBUG stream_writer.py:698 begin sub-negotiation SB TTYPE
DEBUG stream_writer.py:685 sub-negotiation cmd TTYPE SE completion byte
DEBUG stream_writer.py:3167 pending_option[SB + TTYPE] = False
DEBUG stream_writer.py:2234 recv TTYPE SEND: b''
DEBUG stream_writer.py:2247 send IAC SB TTYPE IS b'xterm-256color' IAC SE
DEBUG stream_writer.py:706 recv IAC WILL ECHO
DEBUG stream_writer.py:722 WILL ECHO unsolicited
DEBUG stream_writer.py:1897 handle_will(ECHO)
DEBUG stream_writer.py:3167 pending_option[DO + ECHO] = True
DEBUG stream_writer.py:947 send IAC DO ECHO
DEBUG stream_writer.py:3167 remote_option[ECHO] = True
DEBUG stream_writer.py:3167 pending_option[DO + ECHO] = False
DEBUG stream_writer.py:706 recv IAC WILL SGA
DEBUG stream_writer.py:722 WILL SGA unsolicited
DEBUG stream_writer.py:1897 handle_will(SGA)
DEBUG stream_writer.py:3167 pending_option[DO + SGA] = True
DEBUG stream_writer.py:947 send IAC DO SGA
DEBUG stream_writer.py:3167 remote_option[SGA] = True
DEBUG stream_writer.py:3167 pending_option[DO + SGA] = False
DEBUG stream_writer.py:706 recv IAC DO NAWS
DEBUG stream_writer.py:1767 handle_do(NAWS)
DEBUG stream_writer.py:3167 pending_option[WILL + NAWS] = True
DEBUG stream_writer.py:947 send IAC WILL NAWS
DEBUG stream_writer.py:2339 send IAC SB NAWS (rows=25, cols=80) IAC SE
DEBUG stream_writer.py:3167 local_option[NAWS] = True
DEBUG stream_writer.py:3167 pending_option[WILL + NAWS] = False
DEBUG client_base.py:460 negotiation complete after 2.00s.
DEBUG stream_writer.py:3167 pending_option[DO + BINARY] = True
DEBUG stream_writer.py:947 send IAC DO BINARY
DEBUG stream_writer.py:3167 pending_option[DO + STATUS] = True
DEBUG stream_writer.py:947 send IAC DO STATUS
DEBUG stream_writer.py:3167 pending_option[DO + CHARSET] = True
DEBUG stream_writer.py:947 send IAC DO CHARSET
DEBUG stream_writer.py:3167 pending_option[DO + EOR] = True
DEBUG stream_writer.py:947 send IAC DO EOR
DEBUG stream_writer.py:3167 pending_option[DO + COM_PORT_OPTION] = True
DEBUG stream_writer.py:947 send IAC DO COM_PORT_OPTION
DEBUG stream_writer.py:3167 pending_option[DO + GMCP] = True
DEBUG stream_writer.py:947 send IAC DO GMCP
DEBUG stream_writer.py:3167 pending_option[DO + MSDP] = True
DEBUG stream_writer.py:947 send IAC DO MSDP
DEBUG stream_writer.py:3167 pending_option[DO + MSSP] = True
DEBUG stream_writer.py:947 send IAC DO MSSP
DEBUG stream_writer.py:3167 pending_option[DO + MSP] = True
DEBUG stream_writer.py:947 send IAC DO MSP
DEBUG stream_writer.py:3167 pending_option[DO + MXP] = True
DEBUG stream_writer.py:947 send IAC DO MXP
DEBUG stream_writer.py:3167 pending_option[DO + ZMP] = True
DEBUG stream_writer.py:947 send IAC DO ZMP
DEBUG stream_writer.py:3167 pending_option[DO + AARDWOLF] = True
DEBUG stream_writer.py:947 send IAC DO AARDWOLF
DEBUG stream_writer.py:3167 pending_option[DO + ATCP] = True
DEBUG stream_writer.py:947 send IAC DO ATCP
INFO fingerprinting.py:746 connection for server fingerprint 6765e0c939dd0e6c
INFO client_base.py:105 Connection closed to
*Generated by* `telnetlib3-fingerprint `_
.. code-block:: shell
telnetlib3-fingerprint --loglevel=debug bbs.cs.nthu.edu.tw 23