Port 2223Rockwell CSP2

Rockwell CSP2 is the service assigned to TCP and UDP port 2223.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 8/10
lookups: 0

1 other service is registered on port 2223. compare all 2 →

Technical Details

what runs on :2223

Rockwell CSP2 is a proprietary industrial-control protocol assigned to both TCP and UDP port 2223. It provides request/response communications between Rockwell Automation clients and controllers; deployments generally use cleartext, vendor-specific messages rather than a modern authenticated or encrypted session. It is related to other Rockwell and EtherNet/IP service ports, but is distinct from EtherNet/IP's commonly used TCP/UDP port 44818 and UDP port 2222.

Security Information

exposure of :2223

risk score

8/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

system averages 2.7 across 915 ports — this one sits 5.3 above.

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

Do not expose this port to the public internet. Legacy Rockwell control protocols commonly lack strong cryptographic protection and may provide device identification, status access, or control operations to an unauthorized client; internet exposure also reveals industrial equipment to scanning and targeted attacks. Restrict it to required control-network peers with segmentation and firewall rules, and use vendor-supported secure remote-access mechanisms instead of direct forwarding.

Record

iana registry entry

port: :2223
service: Rockwell CSP2
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 8/10risk
category: System
usage: This port is used by Rockwell Automation and Allen-Bradley PLCs and related industrial-control equipment for proprietary CSP2 communications. It is most commonly encountered on legacy PLC installations and exposed industrial devices, rather than on general-purpose hosts.
lookups: 0rank 993
added: 2026-08-19
updated: 2026-09-22
references: IANA service name registry — port 2223

Something wrong?

This record is maintained by the engineers who use port 2223. 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 2026-09-22.

01edit any field on a page of its own
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edit this record →back to the registry

Related Ports

all 915 in system →

the 8 most looked-up other ports in system — 915 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:4664	Google Desktop Search	TCP	System	caution	67.2k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:9080	WebSphere HTTP Transport (default)	TCP	Web Services	caution	51.6k
:23	Telnet	TCP	Remote Access	caution	34.8k
:12489	NSClient Monitoring Agent	TCP	Network Services	caution	30.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2223Rockwell CSP2

Technical Details

Security Information

Related Ports

Port 2223Rockwell CSP2