mud.niflheim.one

Connection Banner:

Server URLs

• Telnet: telnet://mud.niflheim.one:3000 📋

Server Info

• Server Location: 🇺🇸 United States (GeoIP)

Telnet Fingerprint

759aef872114a5f7

This fingerprint is unique to this server.

Options offered by server: ECHO, SGA

Options requested from client: LINEMODE

The complete JSON record collected during the scan, including Telnet negotiation results and any MSSP metadata.

Show JSON

{
  "server-probe": {
    "fingerprint": "759aef872114a5f7",
    "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": [
        "LINEMODE"
      ],
      "scan-type": "quick"
    },
    "session_data": {
      "banner_after_return": "Password: ",
      "banner_before_return": "\r\nWelcome to Niflheim MUD v0.575.3 early alpha!\r\n\r\nIf you already have an account, enter your login name to log in.\r\n\r\nYou can type 'new' to create a new account or 'reset' to reset your password.\r\n\r\n(Warning: Things may change drastically and nothing is permanent yet!)\r\n\r\nLogin: ",
      "dsr_replies": 0,
      "dsr_requests": 0,
      "encoding": "ascii",
      "option_states": {
        "server_offered": {
          "ECHO": true
        },
        "server_requested": {
          "LINEMODE": true
        }
      },
      "scan_type": "quick",
      "timing": {
        "probe": 0.5074982643127441,
        "total": 5.094390869140625
      }
    }
  },
  "sessions": [
    {
      "connected": "2026-02-14T17:11:28.347006+00:00",
      "host": "mud.niflheim.one",
      "ip": "208.113.129.93",
      "port": 3000
    }
  ]
}

Connection Log

Debug-level log of the Telnet negotiation session, showing each IAC (Interpret As Command) exchange between client and server.

Generated by telnetlib3-fingerprint

telnetlib3-fingerprint --loglevel=debug mud.niflheim.one 3000

Show Logfile

DEBUG client.py:965 Fingerprint client: host=mud.niflheim.one port=3000
INFO client_base.py:175 Connected to <Peer 208.113.129.93 3000>
DEBUG client_base.py:492 negotiation complete after 0.00s.
DEBUG stream_writer.py:707 recv IAC WONT ECHO
DEBUG stream_writer.py:2025 handle_wont(ECHO)
DEBUG stream_writer.py:3174 remote_option[ECHO] = False
DEBUG stream_writer.py:3174 pending_option[DO + ECHO] = False
DEBUG stream_writer.py:707 recv IAC DO LINEMODE
DEBUG stream_writer.py:1770 handle_do(LINEMODE)
DEBUG stream_writer.py:3174 pending_option[WILL + LINEMODE] = True
DEBUG stream_writer.py:950 send IAC WILL LINEMODE
DEBUG stream_writer.py:3174 pending_option[SB + LINEMODE] = True
DEBUG stream_writer.py:3174 local_option[LINEMODE] = True
DEBUG stream_writer.py:3174 pending_option[WILL + LINEMODE] = False
DEBUG stream_writer.py:1323 IAC GA: Go-Ahead (unhandled).
DEBUG stream_writer.py:699 begin sub-negotiation SB LINEMODE
DEBUG stream_writer.py:686 sub-negotiation cmd LINEMODE SE completion byte
DEBUG stream_writer.py:3174 pending_option[SB + LINEMODE] = False
DEBUG stream_writer.py:2544 recv IAC SB LINEMODE LINEMODE-MODE b'\x01' IAC SE
DEBUG stream_writer.py:1277 set Linemode <b'\x05': lit_echo:False, soft_tab:False, ack:True, trapsig:False, remote:False,
    local:True>
DEBUG stream_writer.py:1280 send IAC SB LINEMODE LINEMODE-MODE <b'\x05': lit_echo:False, soft_tab:False, ack:True, trapsig:False,
    remote:False, local:True> IAC SE
DEBUG stream_writer.py:707 recv IAC WILL ECHO
DEBUG stream_writer.py:723 WILL ECHO unsolicited
DEBUG stream_writer.py:1900 handle_will(ECHO)
DEBUG stream_writer.py:3174 pending_option[DO + ECHO] = True
DEBUG stream_writer.py:950 send IAC DO ECHO
DEBUG stream_writer.py:3174 remote_option[ECHO] = True
DEBUG stream_writer.py:3174 pending_option[DO + ECHO] = False
DEBUG stream_writer.py:1323 IAC GA: Go-Ahead (unhandled).
DEBUG stream_writer.py:3174 pending_option[DO + BINARY] = True
DEBUG stream_writer.py:950 send IAC DO BINARY
DEBUG stream_writer.py:3174 pending_option[DO + SGA] = True
DEBUG stream_writer.py:950 send IAC DO SGA
DEBUG stream_writer.py:3174 pending_option[DO + STATUS] = True
DEBUG stream_writer.py:950 send IAC DO STATUS
DEBUG stream_writer.py:3174 pending_option[DO + CHARSET] = True
DEBUG stream_writer.py:950 send IAC DO CHARSET
DEBUG stream_writer.py:3174 pending_option[DO + EOR] = True
DEBUG stream_writer.py:950 send IAC DO EOR
DEBUG stream_writer.py:3174 pending_option[DO + COM_PORT_OPTION] = True
DEBUG stream_writer.py:950 send IAC DO COM_PORT_OPTION
DEBUG stream_writer.py:3174 pending_option[DO + GMCP] = True
DEBUG stream_writer.py:950 send IAC DO GMCP
DEBUG stream_writer.py:3174 pending_option[DO + MSDP] = True
DEBUG stream_writer.py:950 send IAC DO MSDP
DEBUG stream_writer.py:3174 pending_option[DO + MSSP] = True
DEBUG stream_writer.py:950 send IAC DO MSSP
DEBUG stream_writer.py:3174 pending_option[DO + MSP] = True
DEBUG stream_writer.py:950 send IAC DO MSP
DEBUG stream_writer.py:3174 pending_option[DO + MXP] = True
DEBUG stream_writer.py:950 send IAC DO MXP
DEBUG stream_writer.py:3174 pending_option[DO + ZMP] = True
DEBUG stream_writer.py:950 send IAC DO ZMP
DEBUG stream_writer.py:3174 pending_option[DO + AARDWOLF] = True
DEBUG stream_writer.py:950 send IAC DO AARDWOLF
DEBUG stream_writer.py:3174 pending_option[DO + ATCP] = True
DEBUG stream_writer.py:950 send IAC DO ATCP
DEBUG stream_writer.py:707 recv IAC WILL SGA
DEBUG stream_writer.py:1900 handle_will(SGA)
DEBUG stream_writer.py:924 skip DO SGA; pending_option = True
DEBUG stream_writer.py:3174 remote_option[SGA] = True
DEBUG stream_writer.py:3174 pending_option[DO + SGA] = False
INFO fingerprinting.py:737 new server fingerprint 759aef872114a5f7
INFO client_base.py:106 Connection closed to <Peer 208.113.129.93 3000>