# WS-DD (or just WSD - Web Services Discovery)

## Port: 3702

## Proto: UDP

## Amplification factor: 30-150x (vague depending on SOAP WSDL in use)

## Reflector count: ~422,000 (Nov 2019)

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### Malformed requests

- Broken XML or simply a well formed request that is not in the scope of the SOAP WSDL

### Well-formed requests

- https://docs.microsoft.com/en-us/windows/win32/wsdapi/probematches-message

### Documentation

- http://specs.xmlsoap.org/ws/2005/04/discovery/ws-discovery.pdf
- https://docs.microsoft.com/en-us/sql/relational-databases/xml/requirements-and-limitations-for-xml-schema-collections-on-the-server?view=sql-server-2017
- http://schemas.xmlsoap.org/ws/2006/02/devprof/devicesprofile.xsd
- http://specs.xmlsoap.org/ws/2006/02/devprof/devicesprofile.pdf
