Port 4590Real-time Inter-network Defense (RID)

Carries IETF Real-time Inter-network Defense incident-exchange messages over HTTP protected by TLS.

transport: tcp
in transit: encrypted
assignment: official
risk: 2/10
lookups: 0

also known as rid, RID over HTTP/TLS

Technical Details

what runs on :4590

RID over HTTP/TLS is defined by the IETF for exchanging Real-time Inter-network Defense messages. It runs over TCP, establishes a TLS connection, then uses HTTP requests (including POST) to carry XML RID messages based on IODEF. The registered port is 4590; it is a dedicated RID transport endpoint rather than ordinary HTTPS on port 443.

Security Information

exposure of :4590

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

security averages 3.1 across 374 ports — this one sits 1.1 below.

in transit

encrypted

payloads are protected on the wire

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

RID endpoints may handle sensitive incident and network information, so they should be exposed only to trusted RID peers where possible. TLS protects the exchange and deployments are intended to authenticate communicating systems; still, restrict access and keep the service and its XML/HTTP processing components patched, since reachable parsers can be targets for malformed input or denial of service.

Record

iana registry entry

port: :4590
service: Real-time Inter-network Defense (RID)
transport: TCP
encryption: tls / encrypted
assignment: iana registered
risk: 2/10safe
category: Security Network Services
usage: RID is an IETF protocol for exchanging cyber-incident information between cooperating incident-response systems. A listener on TCP port 4590 is typically a RID service endpoint, not a general-purpose web server; the protocol is documented but rarely encountered in internet-wide scans.
lookups: 0rank 993
added: 2026-10-05
updated: 2026-10-05
references: IANA service name registry — port 4590
RFC 6546

Something wrong?

This record is maintained by the engineers who use port 4590. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-05.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 374 in security →

the 8 most looked-up other ports in security — 374 ports carry that label.

port	service	proto	category	risk	views
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:443	HTTPS	TCPtls	Web Services	caution	65.9k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:8080	HTTP Alternate	TCP	Web Services	caution	44.9k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k

risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :4590Real-time Inter-network Defense (RID)

Technical Details

Security Information

Related Ports

Port 4590Real-time Inter-network Defense (RID)