`_
.. code-block:: shell
telnetlib3-fingerprint --loglevel=debug pocbbs.duckdns.org 23
pocbbs.duckdns.org:2323
-----------------------
**Connection Banner:**
.. raw:: html
Synchronet BBS for Win32 Version 3.19
Telnet connection from: 64.227.40.173
Resolving hostname...
_[!_
_
Synchronet BBS for Win32 Version 3.19 Copyright 2022 Rob Swindell
. +-+ + -+ + ++ ++ + + .
| | || + | | | |
| |+ ++ |+ ++ -+ | ++ + | ++ | | .
. . | || |+ | || | | || | | +| | |
# | - -+ + - ++ - + ++ - ++ +- + +
| Port Charlotte, FL . .
#######
### [ ## . . Telnet: BBS.PCTechDr.com
##] #### Port: 2323
####]## . . ##[########## Dave Weissinger # | _ .
### #### [ #[ ## .SysOp. __)_ | _(__
_ ### ######## ____ . )___ | ___(
) Port of Call Website . )____ | ____(
\ BBS.PCTechDr.xyz )_____ | ____ (
\ FidoNet: 1:135/390 __/ \__ ) FSXNet: 21:3/184 ( . . . . ) \ TQWNet: 1337:3/184 \ / ################################################################################
.. raw:: html
pocbbs.duckdns.org:2323
⎘
BBS Software
~~~~~~~~~~~~
**Detected**: Synchronet
Encoding
~~~~~~~~
- **Effective encoding**: cp437
- **Scanner detected**: ascii
Telnet Fingerprint
~~~~~~~~~~~~~~~~~~
:ref:`d06e080c36c73c6a... `
*This fingerprint is shared by 232 other servers.*
**Options offered by server**: ``AARDWOLF``, ``ATCP``, ``BINARY``, ``CHARSET``, ``COM_PORT``, ``ECHO``, ``EOR``, ``GMCP``, ``MSDP``, ``MSP``, ``MSSP``, ``MXP``, ``SGA``, ``STATUS``, ``ZMP``
**Options requested from client**: ``NAWS``, ``NEW_ENVIRON``, ``TSPEED``, ``TTYPE``
**Data source**: `d06e080c36c73c6a/6888c5f8e4089343.json `_
The complete JSON record collected during the scan,
including Telnet negotiation results and banner data.
.. code-block:: json
{
"server-probe": {
"fingerprint": "d06e080c36c73c6a",
"fingerprint-data": {
"offered-options": [
"AARDWOLF",
"ATCP",
"BINARY",
"CHARSET",
"COM_PORT",
"ECHO",
"EOR",
"GMCP",
"MSDP",
"MSP",
"MSSP",
"MXP",
"SGA",
"STATUS",
"ZMP"
],
"probed-protocol": "server",
"refused-options": [],
"requested-options": [
"NAWS",
"NEW_ENVIRON",
"TSPEED",
"TTYPE"
],
"scan-type": "quick"
},
"session_data": {
"banner_after_return": "\r\n\r\nEnter User Name or Number.\r\nIf you are a new user, enter 'New'.\r\nFor the guest account, enter 'Guest'.\r\nLogin: ",
"banner_before_return": "\r\nSynchronet BBS for Win32 Version 3.19\r\nTelnet connection from: 64.227.40.173\r\nResolving hostname...\r\n\r\n\u001b[s\u001b[0c\u001b[255B\u001b[255C\b_\u001b[6n\u001b[u\u001b[!_\r\ufffd\ufffd\ufffd\u001b[6n\u001b[0m_\u001b[2J\u001b[H\f\r\r Synchronet BBS for Win32 Version 3.19 Copyright 2022 Rob Swindell\r\n\u001b[0m . \u001b[1m+-+ +\u001b[0m \u001b[1m-+\u001b[0m \u001b[1m+\u001b[0m \u001b[1m++\u001b[0m \u001b[1m++\u001b[0m \u001b[1m+ +\u001b[0m .\r\n \u001b[1m| |\u001b[0m \u001b[1m||\u001b[0m \u001b[1m+\u001b[0m \u001b[1m|\u001b[0m \u001b[1m|\u001b[0m \u001b[1m| |\u001b[0m\r\n \u001b[1m| |+ ++\u001b[0m \u001b[1m|+ ++ -+ |\u001b[0m \u001b[1m++ +\u001b[0m \u001b[1m| ++ | |\u001b[0m .\r\n . . \u001b[1m| || |+\u001b[0m \u001b[1m| || | |\u001b[0m \u001b[1m|| |\u001b[0m \u001b[1m| +| | |\u001b[0m\r\n \u001b[1;34m#\u001b[0m| \u001b[1m- -+ +\u001b[0m \u001b[1m- ++ - +\u001b[0m \u001b[1m++ -\u001b[0m \u001b[1m++ +- + +\u001b[0m\r\n | Port Charlotte\u001b[1m, \u001b[0mFL . .\r\n\u001b[1;35m \u001b[0m#######\r\n ###\u001b[47m \u001b[1;33m[\u001b[0m## . . \u001b[34mTelnet: \u001b[37mBBS.PCTechDr.com\r\n\u001b[1;31m \u001b[0m##\u001b[1;33;47m]\u001b[0m#### \u001b[34mPort:\u001b[37m 2323\r\n ####]## . \u001b[33m.\u001b[37m\r\n\u001b[33m \u001b[37m##[########## \u001b[31mDave Weissinger\u001b[37m \u001b[1;31m#\u001b[0;33m|\u001b[1;37m_\u001b[0m .\r\n\u001b[1m \u001b[0m###\u001b[47m \u001b[40m####\u001b[1;33;47m[\u001b[0m#\u001b[1;33;47m[\u001b[0m## \u001b[1;33m.SysOp.\u001b[0m \u001b[1m__)_\u001b[0;33m|\u001b[1;37m_(__\u001b[0m\r\n\u001b[33m_\u001b[37m### ########\u001b[33m____\u001b[37m . \u001b[1m)___\u001b[0;33m|\u001b[1;37m___(\u001b[0m\r\n \u001b[33m)\u001b[37m \u001b[36mPort of Call Website\u001b[37m \u001b[1;36m.\u001b[0m \u001b[1m)____\u001b[0;33m|\u001b[1;37m____(\u001b[0m\r\n \u001b[33m\\\u001b[37m \u001b[31mBBS.PCTechDr.xyz\u001b[37m \u001b[1m)_____\u001b[0;33m|\u001b[1;37m____ (\u001b[0m\r\n \u001b[33m\\\u001b[37m \u001b[1mFidoNet: 1:135/390\u001b[0m \u001b[33m__/ \\__\u001b[37m\r\n \u001b[33m)\u001b[37m \u001b[1;36mFSXNet: 21:3/184\u001b[0m \u001b[33m(\u001b[1m. . . .\u001b[0;33m)\u001b[37m\r\n \u001b[33m\\\u001b[37m \u001b[1;32mTQWNet: 1337:3/184\u001b[0m \u001b[33m\\\u001b[37m \u001b[33m/\u001b[37m\r\n\u001b[34m################################################################################\u001b[37m\r\n\r\n\r\nEnter User Name or Number.\r\nIf you are a new user, enter 'New'.\r\nFor the guest account, enter 'Guest'.\r\nLogin: ",
"encoding": "ascii",
"option_states": {
"server_offered": {
"ECHO": true,
"SGA": true
},
"server_requested": {
"NAWS": true,
"NEW_ENVIRON": true,
"SNDLOC": false,
"TSPEED": true,
"TTYPE": true
}
},
"scan_type": "quick",
"timing": {
"probe": 0.254016637802124,
"total": 7.05617880821228
}
}
},
"sessions": [
{
"connected": "2026-02-09T19:31:08.987789+00:00",
"host": "pocbbs.duckdns.org",
"ip": "174.58.81.72",
"port": 2323
}
]
}
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=pocbbs.duckdns.org port=2323
INFO client_base.py:174 Connected to
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 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:706 recv IAC DO TSPEED
DEBUG stream_writer.py:1767 handle_do(TSPEED)
DEBUG stream_writer.py:3167 pending_option[WILL + TSPEED] = True
DEBUG stream_writer.py:947 send IAC WILL TSPEED
DEBUG stream_writer.py:3167 pending_option[SB + TSPEED] = True
DEBUG stream_writer.py:3167 local_option[TSPEED] = True
DEBUG stream_writer.py:3167 pending_option[WILL + TSPEED] = False
DEBUG stream_writer.py:706 recv IAC DO SNDLOC
DEBUG stream_writer.py:1767 handle_do(SNDLOC)
DEBUG stream_writer.py:1845 DO SNDLOC not supported.
DEBUG stream_writer.py:3167 local_option[SNDLOC] = False
DEBUG stream_writer.py:947 send IAC WONT SNDLOC
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 stream_writer.py:706 recv IAC DO NEW_ENVIRON
DEBUG stream_writer.py:1767 handle_do(NEW_ENVIRON)
DEBUG stream_writer.py:3167 pending_option[WILL + NEW_ENVIRON] = True
DEBUG stream_writer.py:947 send IAC WILL NEW_ENVIRON
DEBUG stream_writer.py:3167 pending_option[SB + NEW_ENVIRON] = True
DEBUG stream_writer.py:3167 local_option[NEW_ENVIRON] = True
DEBUG stream_writer.py:3167 pending_option[WILL + NEW_ENVIRON] = False
DEBUG stream_writer.py:706 recv IAC DONT SNDLOC
DEBUG stream_writer.py:1860 handle_dont(SNDLOC)
DEBUG stream_writer.py:3167 pending_option[WILL + SNDLOC] = 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:698 begin sub-negotiation SB TSPEED
DEBUG stream_writer.py:685 sub-negotiation cmd TSPEED SE completion byte
DEBUG stream_writer.py:3167 pending_option[SB + TSPEED] = False
DEBUG stream_writer.py:2166 recv TSPEED SEND: b''
DEBUG stream_writer.py:2197 send: IAC SB TSPEED IS b'38400',b'38400' IAC SE
DEBUG client_base.py:463 negotiation failed after 4.00s.
DEBUG client_base.py:470 failed-reply: 'SB NEW_ENVIRON'
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
DEBUG stream_writer.py:706 recv IAC WILL BINARY
DEBUG stream_writer.py:1897 handle_will(BINARY)
DEBUG stream_writer.py:921 skip DO BINARY; pending_option = True
DEBUG stream_writer.py:3167 remote_option[BINARY] = True
DEBUG stream_writer.py:3167 pending_option[DO + BINARY] = False
DEBUG stream_writer.py:706 recv IAC WILL STATUS
DEBUG stream_writer.py:1897 handle_will(STATUS)
DEBUG stream_writer.py:3167 remote_option[STATUS] = True
DEBUG stream_writer.py:1038 send IAC SB STATUS SEND IAC SE
DEBUG stream_writer.py:3167 pending_option[SB + STATUS] = True
DEBUG stream_writer.py:3167 pending_option[DO + STATUS] = False
DEBUG stream_writer.py:706 recv IAC WILL CHARSET
DEBUG stream_writer.py:1897 handle_will(CHARSET)
DEBUG stream_writer.py:921 skip DO CHARSET; pending_option = True
DEBUG stream_writer.py:3167 remote_option[CHARSET] = True
DEBUG stream_writer.py:3167 pending_option[DO + CHARSET] = False
DEBUG stream_writer.py:706 recv IAC WILL EOR
DEBUG stream_writer.py:1897 handle_will(EOR)
DEBUG stream_writer.py:921 skip DO EOR; pending_option = True
DEBUG stream_writer.py:3167 remote_option[EOR] = True
DEBUG stream_writer.py:3167 pending_option[DO + EOR] = False
DEBUG stream_writer.py:706 recv IAC WILL COM_PORT_OPTION
DEBUG stream_writer.py:1897 handle_will(COM_PORT_OPTION)
DEBUG stream_writer.py:921 skip DO COM_PORT_OPTION; pending_option = True
DEBUG stream_writer.py:3167 remote_option[COM_PORT_OPTION] = True
DEBUG stream_writer.py:1061 send IAC SB COM-PORT-OPTION SIGNATURE IAC SE
DEBUG stream_writer.py:3167 pending_option[DO + COM_PORT_OPTION] = False
DEBUG stream_writer.py:706 recv IAC WILL GMCP
DEBUG stream_writer.py:1897 handle_will(GMCP)
DEBUG stream_writer.py:921 skip DO GMCP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[GMCP] = True
DEBUG stream_writer.py:3167 pending_option[DO + GMCP] = False
DEBUG stream_writer.py:706 recv IAC WILL MSDP
DEBUG stream_writer.py:1897 handle_will(MSDP)
DEBUG stream_writer.py:921 skip DO MSDP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[MSDP] = True
DEBUG stream_writer.py:3167 pending_option[DO + MSDP] = False
DEBUG stream_writer.py:706 recv IAC WILL MSSP
DEBUG stream_writer.py:1897 handle_will(MSSP)
DEBUG stream_writer.py:921 skip DO MSSP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[MSSP] = True
DEBUG stream_writer.py:3167 pending_option[DO + MSSP] = False
DEBUG stream_writer.py:706 recv IAC WILL MSP
DEBUG stream_writer.py:1897 handle_will(MSP)
DEBUG stream_writer.py:921 skip DO MSP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[MSP] = True
DEBUG stream_writer.py:3167 pending_option[DO + MSP] = False
DEBUG stream_writer.py:706 recv IAC WILL MXP
DEBUG stream_writer.py:1897 handle_will(MXP)
DEBUG stream_writer.py:921 skip DO MXP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[MXP] = True
DEBUG stream_writer.py:3167 pending_option[SB + MXP] = True
DEBUG stream_writer.py:3167 pending_option[DO + MXP] = False
DEBUG stream_writer.py:706 recv IAC WILL ZMP
DEBUG stream_writer.py:1897 handle_will(ZMP)
DEBUG stream_writer.py:921 skip DO ZMP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[ZMP] = True
DEBUG stream_writer.py:3167 pending_option[DO + ZMP] = False
DEBUG stream_writer.py:706 recv IAC WILL AARDWOLF
DEBUG stream_writer.py:1897 handle_will(AARDWOLF)
DEBUG stream_writer.py:921 skip DO AARDWOLF; pending_option = True
DEBUG stream_writer.py:3167 remote_option[AARDWOLF] = True
DEBUG stream_writer.py:3167 pending_option[DO + AARDWOLF] = False
DEBUG stream_writer.py:706 recv IAC WILL ATCP
DEBUG stream_writer.py:1897 handle_will(ATCP)
DEBUG stream_writer.py:921 skip DO ATCP; pending_option = True
DEBUG stream_writer.py:3167 remote_option[ATCP] = True
DEBUG stream_writer.py:3167 pending_option[DO + ATCP] = False
INFO fingerprinting.py:746 connection for server fingerprint d06e080c36c73c6a
INFO client_base.py:105 Connection closed to
*Generated by* `telnetlib3-fingerprint `_
.. code-block:: shell
telnetlib3-fingerprint --loglevel=debug pocbbs.duckdns.org 2323
pocbbs.duckdns.org:6400
-----------------------
**Connection Banner:**
.. raw:: html
tcpser device: waiting for Port of Call BBS to answer
tcpser device: connected to port 6400 unit 1
tcpser device: You will soon be having fun!!
tcpser device: Hold on!! :)
IMAGE BBS 64 V3.0 (C) 2020
CONNECTION CONFIRMED: 38400
HIT YOUR BACKSPACE/DELETE KEY 1 TIME 1:
.. raw:: html
pocbbs.duckdns.org:6400
⎘
Encoding
~~~~~~~~
- **Effective encoding**: cp437
- **Scanner detected**: ascii
Telnet Fingerprint
~~~~~~~~~~~~~~~~~~
:ref:`a8a260cc4662430c... `
*This fingerprint is shared by 169 other servers.*
**Data source**: `a8a260cc4662430c/67602d7de641209d.json `_
The complete JSON record collected during the scan,
including Telnet negotiation results and banner data.
.. code-block:: json
{
"server-probe": {
"fingerprint": "a8a260cc4662430c",
"fingerprint-data": {
"offered-options": [],
"probed-protocol": "server",
"refused-options": [
"AARDWOLF",
"ATCP",
"BINARY",
"CHARSET",
"COM_PORT",
"ECHO",
"EOR",
"GMCP",
"MSDP",
"MSP",
"MSSP",
"MXP",
"SGA",
"STATUS",
"ZMP"
],
"requested-options": [],
"scan-type": "quick"
},
"session_data": {
"banner_after_return": "\u001b[6n\r\n\r\nHIT YOUR BACKSPACE/DELETE KEY 1 TIME 1\u0007: ",
"banner_before_return": "tcpser device: waiting for Port of Call BBS to answer\r\ntcpser device: connected to port 6400 unit 1 \r\ntcpser device: You will soon be having fun!!\r\ntcpser device: Hold on!! :)\r\n IMAGE BBS 64 V3.0 (C) 2020 \r\n\r\n\u0007\r\nCONNECTION CONFIRMED: 38400\r\n\u001b[6n\r\n\r\nHIT YOUR BACKSPACE/DELETE KEY 1 TIME 1\u0007: ",
"encoding": "ascii",
"option_states": {
"server_offered": {},
"server_requested": {}
},
"scan_type": "quick",
"timing": {
"probe": 0.5061404705047607,
"total": 7.332437038421631
}
}
},
"sessions": [
{
"connected": "2026-02-09T19:36:25.141308+00:00",
"host": "pocbbs.duckdns.org",
"ip": "174.58.81.72",
"port": 6400
}
]
}
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=pocbbs.duckdns.org port=6400
INFO client_base.py:174 Connected to
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 + SGA] = True
DEBUG stream_writer.py:947 send IAC DO SGA
DEBUG stream_writer.py:3167 pending_option[DO + ECHO] = True
DEBUG stream_writer.py:947 send IAC DO ECHO
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 a8a260cc4662430c
INFO client_base.py:105 Connection closed to
*Generated by* `telnetlib3-fingerprint `_
.. code-block:: shell
telnetlib3-fingerprint --loglevel=debug pocbbs.duckdns.org 6400