Add 20 honeypot services: email, DB, ICS, cloud, IoT, network protocols

Tier 1 (upstream images): telnet (cowrie), smtp (mailoney),
elasticsearch (elasticpot), conpot (Modbus/S7/SNMP ICS).

Tier 2 (custom asyncio honeypots): pop3, imap, mysql, mssql, redis,
mongodb, postgres, ldap, vnc, docker_api, k8s, sip, mqtt, llmnr, snmp,
tftp — each with Dockerfile, entrypoint, and protocol-accurate
handshake/credential capture.

Adds 256 pytest cases covering registration, compose fragments,
LOG_TARGET propagation, and Dockerfile presence for all 25 services.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/vnc/vnc_honeypot.py

@@ -0,0 +1,111 @@
+#!/usr/bin/env python3
+"""
+VNC (RFB) honeypot.
+Performs the RFB 3.8 handshake, offers VNC authentication, captures the
+24-byte DES-encrypted challenge response, then rejects with "Authentication
+failed". Logs the raw response for offline cracking.
+"""
+
+import asyncio
+import json
+import os
+import socket
+from datetime import datetime, timezone
+
+HONEYPOT_NAME = os.environ.get("HONEYPOT_NAME", "desktop")
+LOG_TARGET = os.environ.get("LOG_TARGET", "")
+
+# RFB challenge — fixed so captured responses are reproducible
+_CHALLENGE = bytes(range(16)) * 1 + b"\x10\x11\x12\x13\x14\x15\x16\x17"  # 24 bytes
+
+
+def _forward(event: dict) -> None:
+    if not LOG_TARGET:
+        return
+    try:
+        host, port = LOG_TARGET.rsplit(":", 1)
+        with socket.create_connection((host, int(port)), timeout=3) as s:
+            s.sendall((json.dumps(event) + "\n").encode())
+    except Exception:
+        pass
+
+
+def _log(event_type: str, **kwargs) -> None:
+    event = {
+        "ts": datetime.now(timezone.utc).isoformat(),
+        "service": "vnc",
+        "host": HONEYPOT_NAME,
+        "event": event_type,
+        **kwargs,
+    }
+    print(json.dumps(event), flush=True)
+    _forward(event)
+
+
+class VNCProtocol(asyncio.Protocol):
+    def __init__(self):
+        self._transport = None
+        self._peer = None
+        self._buf = b""
+        self._state = "version"
+
+    def connection_made(self, transport):
+        self._transport = transport
+        self._peer = transport.get_extra_info("peername", ("?", 0))
+        _log("connect", src=self._peer[0], src_port=self._peer[1])
+        # Send RFB version
+        transport.write(b"RFB 003.008\n")
+
+    def data_received(self, data):
+        self._buf += data
+        self._process()
+
+    def _process(self):
+        if self._state == "version":
+            if b"\n" not in self._buf:
+                return
+            line, self._buf = self._buf.split(b"\n", 1)
+            client_version = line.decode(errors="replace").strip()
+            _log("version", src=self._peer[0], client_version=client_version)
+            # Send security types: 1 type = VNC Authentication (2)
+            self._transport.write(b"\x01\x02")
+            self._state = "security_choice"
+
+        elif self._state == "security_choice":
+            if len(self._buf) < 1:
+                return
+            chosen = self._buf[0]
+            self._buf = self._buf[1:]
+            _log("security_choice", src=self._peer[0], type=chosen)
+            # Send 16-byte challenge
+            self._transport.write(_CHALLENGE[:16])
+            self._state = "auth_response"
+
+        elif self._state == "auth_response":
+            if len(self._buf) < 16:
+                return
+            response = self._buf[:16]
+            self._buf = self._buf[16:]
+            _log("auth_response", src=self._peer[0], response=response.hex())
+            # SecurityResult: 1 = failed
+            self._transport.write(b"\x00\x00\x00\x01")
+            # Failure reason
+            reason = b"Authentication failed"
+            import struct
+            self._transport.write(struct.pack(">I", len(reason)) + reason)
+            self._transport.close()
+
+    def connection_lost(self, exc):
+        _log("disconnect", src=self._peer[0] if self._peer else "?")
+
+
+async def main():
+    _log("startup", msg=f"VNC honeypot starting as {HONEYPOT_NAME}")
+    loop = asyncio.get_running_loop()
+    server = await loop.create_server(VNCProtocol, "0.0.0.0", 5900)
+    async with server:
+        await server.serve_forever()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())