www.derpymud.com

Connection Banner:

Welcome to DerpyMUD! enter user name:

Server URLs

Server Info

  • Server Location: 🇬🇧 United Kingdom (GeoIP)

Protocol Support

MUD-specific protocols detected via MSSP flags or Telnet negotiation.

  • MSSP: No

  • GMCP: No

  • MSDP: No

  • MCCP: No

  • MCCP2: Negotiated

  • MXP: No

  • MSP: No

  • MCP: No

  • ZMP: No

Telnet Fingerprint

f6a5496e2526e8ab

This fingerprint is unique to this server.

Options offered by server: MCCP2, SGA

Options requested from client: MCCP2, NAWS

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

Show JSON
{
  "server-probe": {
    "fingerprint": "f6a5496e2526e8ab",
    "fingerprint-data": {
      "offered-options": [
        "MCCP2",
        "SGA"
      ],
      "probed-protocol": "server",
      "refused-options": [
        "AARDWOLF",
        "ATCP",
        "BINARY",
        "CHARSET",
        "COM_PORT",
        "ECHO",
        "EOR",
        "GMCP",
        "MCCP3",
        "MSDP",
        "MSP",
        "MSSP",
        "MXP",
        "STATUS",
        "ZMP"
      ],
      "requested-options": [
        "MCCP2",
        "NAWS"
      ],
      "scan-type": "quick"
    },
    "session_data": {
      "banner_after_return": "",
      "banner_before_return": "Welcome to DerpyMUD!\r\n\r\nenter user name:\r\n",
      "dsr_replies": 0,
      "dsr_requests": 0,
      "encoding": "ascii",
      "option_states": {
        "server_offered": {
          "0x55": false,
          "AARDWOLF": false,
          "ATCP": false,
          "GMCP": false,
          "MCCP2": true,
          "MCCP3": false,
          "MSDP": false,
          "MSP": false,
          "MSSP": false,
          "MXP": false,
          "ZMP": false
        },
        "server_requested": {
          "AARDWOLF": false,
          "ATCP": false,
          "GMCP": false,
          "MCCP2": true,
          "MCCP3": false,
          "MSDP": false,
          "MSP": false,
          "MSSP": false,
          "MXP": false,
          "NAWS": true,
          "ZMP": false
        }
      },
      "scan_type": "quick",
      "timing": {
        "probe": 0.4058115482330322,
        "total": 10.913231611251831
      }
    }
  },
  "sessions": [
    {
      "connected": "2026-03-07T05:04:30.784731+00:00",
      "host": "www.derpymud.com",
      "ip": "86.26.80.47",
      "port": 23
    },
    {
      "connected": "2026-04-07T06:55:07.324882+00:00",
      "host": "www.derpymud.com",
      "ip": "86.26.80.47",
      "port": 23
    }
  ]
}

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 www.derpymud.com 23
Show Logfile
DEBUG client.py:1200 Fingerprint client: host=www.derpymud.com port=23
INFO client_base.py:190 Connected to <Peer 86.26.80.47 23>
DEBUG stream_writer.py:3384 pending_option[WILL + MCCP3_COMPRESS] = True
DEBUG stream_writer.py:1024 send IAC WILL MCCP3_COMPRESS
DEBUG stream_writer.py:3384 pending_option[WILL + MXP] = True
DEBUG stream_writer.py:1024 send IAC WILL MXP
DEBUG stream_writer.py:3384 pending_option[WILL + GMCP] = True
DEBUG stream_writer.py:1024 send IAC WILL GMCP
DEBUG stream_writer.py:3384 pending_option[WILL + AARDWOLF] = True
DEBUG stream_writer.py:1024 send IAC WILL AARDWOLF
DEBUG stream_writer.py:3384 pending_option[WILL + MSP] = True
DEBUG stream_writer.py:1024 send IAC WILL MSP
DEBUG stream_writer.py:3384 pending_option[WILL + MSSP] = True
DEBUG stream_writer.py:1024 send IAC WILL MSSP
DEBUG stream_writer.py:3384 pending_option[WILL + MSDP] = True
DEBUG stream_writer.py:1024 send IAC WILL MSDP
DEBUG stream_writer.py:3384 pending_option[WILL + MCCP2_COMPRESS] = True
DEBUG stream_writer.py:1024 send IAC WILL MCCP2_COMPRESS
DEBUG stream_writer.py:3384 pending_option[WILL + ZMP] = True
DEBUG stream_writer.py:1024 send IAC WILL ZMP
DEBUG stream_writer.py:3384 pending_option[WILL + ATCP] = True
DEBUG stream_writer.py:1024 send IAC WILL ATCP
DEBUG stream_writer.py:3384 pending_option[DO + MCCP3_COMPRESS] = True
DEBUG stream_writer.py:1024 send IAC DO MCCP3_COMPRESS
DEBUG stream_writer.py:3384 pending_option[DO + MXP] = True
DEBUG stream_writer.py:1024 send IAC DO MXP
DEBUG stream_writer.py:3384 pending_option[DO + GMCP] = True
DEBUG stream_writer.py:1024 send IAC DO GMCP
DEBUG stream_writer.py:3384 pending_option[DO + AARDWOLF] = True
DEBUG stream_writer.py:1024 send IAC DO AARDWOLF
DEBUG stream_writer.py:3384 pending_option[DO + MSP] = True
DEBUG stream_writer.py:1024 send IAC DO MSP
DEBUG stream_writer.py:3384 pending_option[DO + MSSP] = True
DEBUG stream_writer.py:1024 send IAC DO MSSP
DEBUG stream_writer.py:3384 pending_option[DO + MSDP] = True
DEBUG stream_writer.py:1024 send IAC DO MSDP
DEBUG stream_writer.py:3384 pending_option[DO + MCCP2_COMPRESS] = True
DEBUG stream_writer.py:1024 send IAC DO MCCP2_COMPRESS
DEBUG stream_writer.py:3384 pending_option[DO + ZMP] = True
DEBUG stream_writer.py:1024 send IAC DO ZMP
DEBUG stream_writer.py:3384 pending_option[DO + ATCP] = True
DEBUG stream_writer.py:1024 send IAC DO ATCP
DEBUG stream_writer.py:773 recv IAC DO NAWS
DEBUG stream_writer.py:1887 handle_do(NAWS)
DEBUG stream_writer.py:3384 pending_option[WILL + NAWS] = True
DEBUG stream_writer.py:1024 send IAC WILL NAWS
DEBUG stream_writer.py:2507 send IAC SB NAWS (rows=25, cols=80) IAC SE
DEBUG stream_writer.py:3384 local_option[NAWS] = True
DEBUG stream_writer.py:3384 pending_option[WILL + NAWS] = False
DEBUG stream_writer.py:773 recv IAC WILL MCCP2_COMPRESS
DEBUG stream_writer.py:2045 handle_will(MCCP2_COMPRESS)
DEBUG stream_writer.py:998 skip DO MCCP2_COMPRESS; pending_option = True
DEBUG stream_writer.py:3384 remote_option[MCCP2_COMPRESS] = True
DEBUG stream_writer.py:3384 pending_option[DO + MCCP2_COMPRESS] = False
DEBUG stream_writer.py:773 recv IAC WILL MCCP_COMPRESS
DEBUG stream_writer.py:789 WILL MCCP_COMPRESS unsolicited
DEBUG stream_writer.py:2045 handle_will(MCCP_COMPRESS)
DEBUG stream_writer.py:3384 remote_option[MCCP_COMPRESS] = False
DEBUG stream_writer.py:1024 send IAC DONT MCCP_COMPRESS
DEBUG stream_writer.py:2182 Unhandled: WILL MCCP_COMPRESS.
DEBUG stream_writer.py:773 recv IAC DONT MCCP3_COMPRESS
DEBUG stream_writer.py:2010 handle_dont(MCCP3_COMPRESS)
DEBUG stream_writer.py:3384 pending_option[WILL + MCCP3_COMPRESS] = False
DEBUG stream_writer.py:3384 local_option[MCCP3_COMPRESS] = False
DEBUG stream_writer.py:773 recv IAC DONT MXP
DEBUG stream_writer.py:2010 handle_dont(MXP)
DEBUG stream_writer.py:3384 pending_option[WILL + MXP] = False
DEBUG stream_writer.py:3384 local_option[MXP] = False
DEBUG stream_writer.py:773 recv IAC DONT GMCP
DEBUG stream_writer.py:2010 handle_dont(GMCP)
DEBUG stream_writer.py:3384 pending_option[WILL + GMCP] = False
DEBUG stream_writer.py:3384 local_option[GMCP] = False
DEBUG stream_writer.py:773 recv IAC DONT AARDWOLF
DEBUG stream_writer.py:2010 handle_dont(AARDWOLF)
DEBUG stream_writer.py:3384 pending_option[WILL + AARDWOLF] = False
DEBUG stream_writer.py:3384 local_option[AARDWOLF] = False
DEBUG stream_writer.py:773 recv IAC DONT MSP
DEBUG stream_writer.py:2010 handle_dont(MSP)
DEBUG stream_writer.py:3384 pending_option[WILL + MSP] = False
DEBUG stream_writer.py:3384 local_option[MSP] = False
DEBUG stream_writer.py:773 recv IAC DONT MSSP
DEBUG stream_writer.py:2010 handle_dont(MSSP)
DEBUG stream_writer.py:3384 pending_option[WILL + MSSP] = False
DEBUG stream_writer.py:3384 local_option[MSSP] = False
DEBUG stream_writer.py:773 recv IAC DONT MSDP
DEBUG stream_writer.py:2010 handle_dont(MSDP)
DEBUG stream_writer.py:3384 pending_option[WILL + MSDP] = False
DEBUG stream_writer.py:3384 local_option[MSDP] = False
DEBUG stream_writer.py:773 recv IAC DO MCCP2_COMPRESS
DEBUG stream_writer.py:1887 handle_do(MCCP2_COMPRESS)
DEBUG stream_writer.py:998 skip WILL MCCP2_COMPRESS; pending_option = True
DEBUG stream_writer.py:3384 local_option[MCCP2_COMPRESS] = True
DEBUG stream_writer.py:3384 pending_option[WILL + MCCP2_COMPRESS] = False
DEBUG stream_writer.py:767 begin sub-negotiation SB MCCP2_COMPRESS
DEBUG stream_writer.py:754 sub-negotiation cmd MCCP2_COMPRESS SE completion byte
DEBUG stream_writer.py:2238 [SB + MCCP2_COMPRESS] unsolicited
DEBUG stream_writer.py:3232 MCCP2 activated
DEBUG client_base.py:483 MCCP2 decompression started (server→client)
DEBUG stream_writer.py:773 recv IAC DONT ZMP
DEBUG stream_writer.py:2010 handle_dont(ZMP)
DEBUG stream_writer.py:3384 pending_option[WILL + ZMP] = False
DEBUG stream_writer.py:3384 local_option[ZMP] = False
DEBUG stream_writer.py:773 recv IAC DONT ATCP
DEBUG stream_writer.py:2010 handle_dont(ATCP)
DEBUG stream_writer.py:3384 pending_option[WILL + ATCP] = False
DEBUG stream_writer.py:3384 local_option[ATCP] = False
DEBUG stream_writer.py:773 recv IAC WONT MCCP3_COMPRESS
DEBUG stream_writer.py:2199 handle_wont(MCCP3_COMPRESS)
DEBUG stream_writer.py:3384 remote_option[MCCP3_COMPRESS] = False
DEBUG stream_writer.py:3384 pending_option[DO + MCCP3_COMPRESS] = False
DEBUG stream_writer.py:773 recv IAC WONT MXP
DEBUG stream_writer.py:2199 handle_wont(MXP)
DEBUG stream_writer.py:3384 remote_option[MXP] = False
DEBUG stream_writer.py:3384 pending_option[DO + MXP] = False
DEBUG stream_writer.py:773 recv IAC WONT GMCP
DEBUG stream_writer.py:2199 handle_wont(GMCP)
DEBUG stream_writer.py:3384 remote_option[GMCP] = False
DEBUG stream_writer.py:3384 pending_option[DO + GMCP] = False
DEBUG stream_writer.py:773 recv IAC WONT AARDWOLF
DEBUG stream_writer.py:2199 handle_wont(AARDWOLF)
DEBUG stream_writer.py:3384 remote_option[AARDWOLF] = False
DEBUG stream_writer.py:3384 pending_option[DO + AARDWOLF] = False
DEBUG stream_writer.py:773 recv IAC WONT MSP
DEBUG stream_writer.py:2199 handle_wont(MSP)
DEBUG stream_writer.py:3384 remote_option[MSP] = False
DEBUG stream_writer.py:3384 pending_option[DO + MSP] = False
DEBUG stream_writer.py:773 recv IAC WONT MSSP
DEBUG stream_writer.py:2199 handle_wont(MSSP)
DEBUG stream_writer.py:3384 remote_option[MSSP] = False
DEBUG stream_writer.py:3384 pending_option[DO + MSSP] = False
DEBUG stream_writer.py:773 recv IAC WONT MSDP
DEBUG stream_writer.py:2199 handle_wont(MSDP)
DEBUG stream_writer.py:3384 remote_option[MSDP] = False
DEBUG stream_writer.py:3384 pending_option[DO + MSDP] = False
DEBUG stream_writer.py:773 recv IAC WONT ZMP
DEBUG stream_writer.py:2199 handle_wont(ZMP)
DEBUG stream_writer.py:3384 remote_option[ZMP] = False
DEBUG stream_writer.py:3384 pending_option[DO + ZMP] = False
DEBUG stream_writer.py:773 recv IAC WONT ATCP
DEBUG stream_writer.py:2199 handle_wont(ATCP)
DEBUG stream_writer.py:3384 remote_option[ATCP] = False
DEBUG stream_writer.py:3384 pending_option[DO + ATCP] = False
DEBUG stream_writer.py:773 recv IAC DO NAWS
DEBUG stream_writer.py:1887 handle_do(NAWS)
DEBUG stream_writer.py:2507 send IAC SB NAWS (rows=25, cols=80) IAC SE
DEBUG client_base.py:531 negotiation complete after 0.53s.
DEBUG stream_writer.py:3384 pending_option[DO + BINARY] = True
DEBUG stream_writer.py:1024 send IAC DO BINARY
DEBUG stream_writer.py:3384 pending_option[DO + SGA] = True
DEBUG stream_writer.py:1024 send IAC DO SGA
DEBUG stream_writer.py:3384 pending_option[DO + ECHO] = True
DEBUG stream_writer.py:1024 send IAC DO ECHO
DEBUG stream_writer.py:3384 pending_option[DO + STATUS] = True
DEBUG stream_writer.py:1024 send IAC DO STATUS
DEBUG stream_writer.py:3384 pending_option[DO + CHARSET] = True
DEBUG stream_writer.py:1024 send IAC DO CHARSET
DEBUG stream_writer.py:3384 pending_option[DO + EOR] = True
DEBUG stream_writer.py:1024 send IAC DO EOR
DEBUG stream_writer.py:3384 pending_option[DO + COM_PORT_OPTION] = True
DEBUG stream_writer.py:1024 send IAC DO COM_PORT_OPTION
DEBUG stream_writer.py:773 recv IAC WONT BINARY
DEBUG stream_writer.py:2199 handle_wont(BINARY)
DEBUG stream_writer.py:3384 remote_option[BINARY] = False
DEBUG stream_writer.py:3384 pending_option[DO + BINARY] = False
DEBUG stream_writer.py:773 recv IAC WILL SGA
DEBUG stream_writer.py:2045 handle_will(SGA)
DEBUG stream_writer.py:998 skip DO SGA; pending_option = True
DEBUG stream_writer.py:3384 remote_option[SGA] = True
DEBUG stream_writer.py:3384 pending_option[DO + SGA] = False
DEBUG stream_writer.py:773 recv IAC WONT ECHO
DEBUG stream_writer.py:2199 handle_wont(ECHO)
DEBUG stream_writer.py:3384 remote_option[ECHO] = False
DEBUG stream_writer.py:3384 pending_option[DO + ECHO] = False
DEBUG stream_writer.py:773 recv IAC WONT STATUS
DEBUG stream_writer.py:2199 handle_wont(STATUS)
DEBUG stream_writer.py:3384 remote_option[STATUS] = False
DEBUG stream_writer.py:3384 pending_option[DO + STATUS] = False
DEBUG stream_writer.py:773 recv IAC WONT CHARSET
DEBUG stream_writer.py:2199 handle_wont(CHARSET)
DEBUG stream_writer.py:3384 remote_option[CHARSET] = False
DEBUG stream_writer.py:3384 pending_option[DO + CHARSET] = False
DEBUG stream_writer.py:773 recv IAC WONT EOR
DEBUG stream_writer.py:2199 handle_wont(EOR)
DEBUG stream_writer.py:3384 remote_option[EOR] = False
DEBUG stream_writer.py:3384 pending_option[DO + EOR] = False
DEBUG stream_writer.py:773 recv IAC WONT COM_PORT_OPTION
DEBUG stream_writer.py:2199 handle_wont(COM_PORT_OPTION)
DEBUG stream_writer.py:3384 remote_option[COM_PORT_OPTION] = False
DEBUG stream_writer.py:3384 pending_option[DO + COM_PORT_OPTION] = False
DEBUG fingerprinting.py:849 connection for server fingerprint f6a5496e2526e8ab
INFO client_base.py:122 Connection closed to <Peer 86.26.80.47 23>