715

IANA registers TCP port 715 as iris-lwz (IRIS-LWZ) and cites RFC 4993. However, that RFC specifies IRIS-LWZ over UDP and registers UDP port 715. The supplied evidence does not explain the TCP assignment or establish what, if anything, currently listens on 715/tcp. For this transport, the protocol use is Unknown.

RFC 4993 describes a one-packet UDP request and response carrying IRIS data, with optional DEFLATE compression. It says the protocol is intended for public data, but provides no in-band authentication or confidentiality. Those details describe UDP IRIS-LWZ; they do not establish behavior or intended audience for TCP port 715.

No deployment observations or scoped traffic measurements are supplied. The registration alone cannot establish prevalence, a running application, or whether this TCP port should be reachable from the public internet. Treat its exposure policy as Unknown until the service and intended audience are identified.

Registered name

iris-lwz is listed for 715/tcp by IANA; RFC 4993 describes IRIS-LWZ on UDP, not TCP.

TCP protocol

Unknown; the supplied sources do not specify a TCP protocol for this port.

Exposure

Unknown; the TCP service audience is not established by the evidence.

IANA service name

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

IANA description

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

Protocol on 715/tcp

Unknown

Protocol security properties for TCP

Unknown

RFC reference

IANA lists RFC 4993 for the iris-lwz TCP registration; RFC 4993 specifies a lightweight UDP transfer protocol for IRIS [Confirmed] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv; https://www.rfc-editor.org/rfc/rfc4993.txt

Port 715/UDP is registered for IRIS-LWZ, a lightweight UDP transport for the Internet Registry Information Service (IRIS). The RFC describes it as a way to exchange IRIS requests and responses in single UDP packets and says it is intended for serving public data. The protocol evidence supports a public service role, but does not show that any particular host runs it.

An IRIS-LWZ request and response each use one UDP packet. The payload may be compressed with DEFLATE. Packet-size limits include the UDP header: when path MTU is unknown, the maximum is 1,500 octets; when known, it must not exceed either the path MTU or 4,000 octets. RFC 4993 advises using another IRIS transfer protocol when a request needs authentication, confidentiality, or a larger response.

The protocol has no in-band authentication or confidentiality. RFC 4993 warns that messages can be altered and that servers can be used for UDP reflection attacks. Internet-facing deployments should account for spoofed traffic and restrict service behavior to the intended registry data and clients where appropriate.

Exposure

Unknown — RFC 4993 describes IRIS-LWZ as intended for serving public data and registers UDP port 715; neither establishes any deployment's actual exposure or recommends unrestricted Internet access.

Security

No in-band authentication or confidentiality; RFC 4993 identifies message alteration and UDP reflection risks.

Traffic

IRIS request and response exchange, one UDP packet in each direction; optional DEFLATE compression.

Service

iris-lwz — IRIS-LWZ [Confirmed] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv

Protocol

Lightweight UDP transfer protocol for the Internet Registry Information Service (IRIS); one packet per request and response

Security

No in-band authentication or confidentiality; message alteration and reflection attack risks are described [Confirmed] — https://www.rfc-editor.org/rfc/rfc4993.txt

Deployment prevalence

Unknown; registration does not establish current deployment or traffic prevalence [Unknown] — https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv