603

IANA registers UDP port 603 as idxp for IDXP and cites RFC 4767. The registry assignment identifies the service name, but does not establish that hosts deploy IDXP over UDP. The supplied RFC describes IDXP’s application protocol over a connection-oriented protocol; it does not verify UDP operation on port 603.

RFC 4767 describes IDXP as a way for intrusion detection entities to exchange IDMEF messages, text, and binary data. It says the protocol relies on BEEP and recommends underlying security profiles for authentication, integrity, and confidentiality. Those design details describe IDXP generally and do not demonstrate observed traffic or deployment on this UDP port.

Whether UDP 603 is reachable or appropriate on the public internet is Unknown from the evidence. Treat the assignment as a registry clue, not proof of a running service. If investigating traffic, confirm the application protocol and transport at the host; do not apply the RFC’s TCP registration to UDP.

Exposure

Unknown; no evidence establishes UDP 603 deployment or reachability.

Security

IDXP exchanges intrusion detection data; RFC 4767 describes security properties over a connection-oriented protocol, not confirmed UDP service behavior.

Analyst note

Verify protocol and transport at the host before attributing traffic to IDXP.

Service

idxp, described as IDXP [Confirmed] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv

Protocol role

Exchange of data between intrusion detection entities

RFC reference

RFC 4767 [Confirmed] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv

UDP 603 deployment

Unknown [Unknown] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv