{"id":"ethernet-ip","model_id":"EtherNet/IP","name":"EtherNet/IP","summary":"EtherNet/IP is an industrial network protocol that runs the Common Industrial Protocol (CIP) over standard, unmodified Ethernet and TCP/IP. TCP carries messaging such as configuration and diagnostics, and UDP carries real-time cyclic I/O data. It is managed by ODVA.","study_notes":["The IP stands for Industrial Protocol, not Internet Protocol.","CIP is the shared application layer, so the same object model also runs on DeviceNet and other CIP networks.","Port 44818 carries messaging and port 2222 carries cyclic I/O."],"safety_notes":["CIP Security adds TLS and DTLS (port 2221). Devices without it accept unauthenticated commands from anyone on the network."],"sources":[{"url":"https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=ethernet-ip","title":"IANA Service Name and Transport Protocol Port Number Registry","accessed":"2026-10-25"},{"url":"https://www.odva.org/technology-standards/key-technologies/ethernet-ip/","title":"ODVA: EtherNet/IP","accessed":"2026-10-25"}],"verification":{"status":"source_checked","checked_at":"2026-10-25","values":18,"method":"llm_source_check"},"updated_at":"2026-10-25","type":"protocol","spec":{"transports":["tcp","udp"],"architecture":"producer_consumer","encoding":"binary","default_ports":[{"port":44818,"transport":"tcp","secure":false,"purpose":"EtherNet/IP messaging"},{"port":44818,"transport":"udp","secure":false,"purpose":"EtherNet/IP messaging"},{"port":2222,"transport":"udp","secure":false,"purpose":"EtherNet/IP I/O"},{"port":2221,"transport":"tcp","secure":true,"purpose":"EtherNet/IP over TLS"},{"port":2221,"transport":"udp","secure":true,"purpose":"EtherNet/IP over DTLS"}],"data_types":[],"standard_body":"ODVA","related":[]},"url":"https://machineschema.com/protocol/ethernet-ip","license":"https://creativecommons.org/licenses/by/4.0/"}