Port 9400Samsung TWAIN for Network Server

Port 9400 is assigned to Samsung TWAIN for Network Server traffic over TCP and UDP.

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

also known as sec-t4net-srv

Technical Details

what runs on :9400

Samsung TWAIN for Network Server is registered on port :9400 over tcp and udp to Dongkeun Kim, assigned February 2007. 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 found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :9400

this machine

# linux
sudo ss -tulpn 'sport = :9400'

# macos / bsd
sudo lsof -nP -i :9400

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :9400

another host

nmap -sV -p T:9400 <host>
sudo nmap -sU -sV -p U:9400 <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 :9400

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 :9400 yet

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

Record

iana registry entry

port: :9400
service: Samsung TWAIN for Network Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: This assignment identifies Samsung TWAIN for Network Server traffic on TCP and UDP port 9400. IANA registered it to Dongkeun Kim in 2007; public deployment details are not documented in the registry.
lookups: 0rank 993
added: 2026-09-15
updated: 2026-09-15
references: IANA service name registry — port 9400

Something wrong?

This record is maintained by the engineers who use port 9400. 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 2026-09-15.

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 :9400, by lookups.

port	service	proto	category	risk	views
:9421	MooseFS Master Server	TCP	Databases	caution	10.2k
:9418	Git Pack Transfer	TCPUDP	File Transfer	caution	10.2k
:9422	MooseFS Chunk Servers	TCP	File Transfer	caution	9.9k
:9420	MooseFS Master-Chunk	TCP	File Transfer	caution	9.0k
:9343	MpIdcMgr	TCPUDP	—	safe	0
:9443	WSO2 Tungsten HTTPS	TCPUDPtls	Web Services	risk	0
:9396	fjinvmgr	TCPUDP	—	safe	0
:9397	MpIdcAgt	TCPUDP	—	safe	0

risk mix of the 8 listed

safe38%
caution50%
risk13%

1 of 8 encrypted

Port :9400Samsung TWAIN for Network Server

Technical Details

Security Information

Related Ports

Port 9400Samsung TWAIN for Network Server