Port 11723EMC XtremSW Distributed Cache

TCP/UDP 11723 is assigned to EMC XtremSW Distributed Cache, an obscure vendor-specific service.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as emc-xsw-dcache

Technical Details

what runs on :11723

EMC XtremSW Distributed Cache is registered on port :11723 over tcp and udp to EMC, assigned September 2013. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :11723

this machine

# linux
sudo ss -tulpn 'sport = :11723'

# macos / bsd
sudo lsof -nP -i :11723

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :11723

another host

nmap -sV -p T:11723 <host>
sudo nmap -sU -sV -p U:11723 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :11723

risk score

1/ 10safe

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

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

no security notes recorded for :11723 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :11723
service: EMC XtremSW Distributed Cache
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA assignment identifies this port for EMC XtremSW distributed cache. There is no reliable basis here to describe its protocol behavior or typical deployment.
lookups: 0rank 993
added: 2026-10-17
updated: 2026-10-17
references: IANA service name registry — port 11723

Something wrong?

This record is maintained by the engineers who use port 11723. 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 2026-10-17.

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

browse categories →

ports registered around :11723, by lookups.

port	service	proto	category	risk	views
:11720	H.323 Call Control Signalling Alternate	TCPUDP	Voice and Chat	caution	0
:11751	Intrepid SSL	TCPUDPtls	—	safe	0

risk mix of the 2 listed

safe50%
caution50%

1 of 2 encrypted

Port :11723EMC XtremSW Distributed Cache

Technical Details

Security Information

Related Ports

Port 11723EMC XtremSW Distributed Cache