Port 12001IBM Enterprise Extender SNA COS Network Priority

IBM Enterprise Extender traffic carrying SNA Class of Service network-priority information over IP.

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

also known as entextnetwk, SNA COS Network Priority

Technical Details

what runs on :12001

Enterprise Extender transports SNA networking over IP; IANA assigns TCP and UDP port 12001 specifically to SNA COS Network Priority traffic. The service is associated with IBM Enterprise Extender and should be interpreted alongside the other ports configured by the IBM SNA/IP deployment. Traffic is not inherently protected by this port assignment and may rely on an external secure tunnel or network controls.

Security Information

exposure of :12001

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 3.5 across 732 ports — this one sits 1.5 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 is an obscure legacy-infrastructure service and is not intended to be exposed directly to the public internet. Restrict it to known IBM SNA/Enterprise Extender peers and monitor unexpected probes; the port itself does not provide encryption or authentication guarantees.

Record

iana registry entry

port: :12001
service: IBM Enterprise Extender SNA COS Network Priority
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: IBM Enterprise Extender deployments use this assignment for SNA traffic and Class of Service network-priority handling across IP networks. Engineers typically encounter it on IBM mainframe or enterprise SNA-to-IP infrastructure, not on general-purpose internet hosts.
lookups: 0rank 994
added: 2026-08-25
updated: 2026-08-25
references: IANA service name registry — port 12001

Something wrong?

This record is maintained by the engineers who use port 12001. 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 2026-08-25.

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edit this record →back to the registry

Related Ports

all 732 in network services →

the 8 most looked-up other ports in network services — 732 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 :12001IBM Enterprise Extender SNA COS Network Priority

Technical Details

Security Information

Related Ports

Port 12001IBM Enterprise Extender SNA COS Network Priority