{
  "port": 1052,
  "protocol": "both",
  "service": "DDT (Dynamic DNS Tools)",
  "oneLiner": "Dynamic DNS Tools — a client/server for remote authenticated DNS updates, dormant since 2013.",
  "whatItIs": "IANA assigns 1052 to `ddt`, \"Dynamic DNS Tools\", a small C++ client/server project that let clients push authenticated updates into a DNS zone before RFC 2136 dynamic update and `nsupdate` became the standard way to do that. The project shipped as `ddt-client` and `ddt-server` in Debian and was last released in 2013; SourceForge marks it inactive. You will rarely meet a live ddt-server today. A listener on 1052 is more often an unrelated application than this project, so fingerprint before you conclude.",
  "exposure": {
    "verdict": "never",
    "note": "A service whose whole job is writing DNS records, with no upstream maintenance since 2013 — do not put it on a public interface; use RFC 2136 with TSIG instead."
  },
  "checkCommand": "nmap -Pn -sV -p 1052 TARGET",
  "links": [
    {
      "title": "Dynamic DNS Tools (DDT) project page",
      "url": "https://sourceforge.net/projects/ddt/",
      "kind": "official-docs"
    },
    {
      "title": "IANA Service Name and Transport Protocol Port Number Registry",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml",
      "kind": "iana"
    }
  ]
}