LAST UPDATED: 2022-08-29
This report identifies devices that have an accessible CoAP (Constrained Application Protocol) on port 5683/UDP. CoAP is a specialized web transfer protocol for use with constrained nodes and constrained networks. As described in RFC 7252, it is designed for machine-to-machine (M2M) applications such as smart energy and building automation.
Exposed CoAP services can be used as reflectors in DDoS amplification attacks. They can also leak information (including authentication credentials), and in some cases may potentially allow for remote manipulation of exposed devices and associated services.
For more details behind the scan methodology and a daily update of global CoAP scan statistics please visit our dedicated CoAP scan page.
We first announced the scan in a blog post titled Accessible CoAP Report – Exposed Constrained Application Protocol Services on the Internet.
For more information on our scanning efforts, check out our Internet scanning summary page.
This report was enabled as part of the European Union INEA CEF VARIoT project.