Port 4377Cambridge Pixel SPx Server

Cambridge Pixel SPx Server distributes radar-related data within systems using Cambridge Pixel SPx software.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as cp-spxsvr

Technical Details

what runs on :4377

The registry assigns this service to TCP and UDP, but does not specify which functions use each transport. SPx Server is a Cambridge Pixel component for distributing radar-related data to other software in an SPx system; the application protocol is vendor-specific, and public documentation does not establish a general-purpose handshake, framing format, or universal default configuration. Treat the port as a product-specific service, not as a standard protocol.

Security Information

exposure of :4377

risk score

2/ 10safe

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

network services averages 2.6 across 1,534 ports — this one sits 0.6 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

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

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

This service is intended for use within a system's trusted network, not for unrestricted internet exposure. Radar or sensor data could be sensitive, and the public information available does not establish that the protocol encrypts traffic or provides authentication; restrict access to known clients and verify the security settings for the deployed product.

Record

iana registry entry

port: :4377
service: Cambridge Pixel SPx Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: This is the IANA assignment for Cambridge Pixel's SPx Server, used in radar and sensor-data systems. It is most likely encountered on networks running Cambridge Pixel software, rather than as a general-purpose internet service.
lookups: 0rank 993
added: 2026-10-04
updated: 2026-10-04
references: IANA service name registry — port 4377

Something wrong?

This record is maintained by the engineers who use port 4377. 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 2026-10-04.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 1,534 in network services →

the 8 most looked-up other ports in network services — 1,534 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :4377Cambridge Pixel SPx Server

Technical Details

Security Information

Related Ports

Port 4377Cambridge Pixel SPx Server