Port 10542MOS Low Priority Port

MOS Low Priority Port is an obscure TCP/UDP assignment with no established common listener.

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

also known as MOS-aux

Technical Details

what runs on :10542

MOS Low Priority Port is registered on port :10542 over tcp and udp to Eric Thorniley, assigned September 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 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 :10542

this machine

# linux
sudo ss -tulpn 'sport = :10542'

# macos / bsd
sudo lsof -nP -i :10542

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :10542

another host

nmap -sV -p T:10542 <host>
sudo nmap -sU -sV -p U:10542 <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 :10542

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 :10542 yet

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

Record

iana registry entry

port: :10542
service: MOS Low Priority Port
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns MOS-aux, described as the MOS Low Priority Port, to TCP and UDP and lists Eric Thorniley as the registrant. No widely recognized software or routine listener is known for it.
lookups: 0rank 993
added: 2026-10-16
updated: 2026-10-16
references: IANA service name registry — port 10542

Something wrong?

This record is maintained by the engineers who use port 10542. 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 2026-10-16.

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 :10542, by lookups.

port	service	proto	category	risk	views
:10480	SWAT 4 Dedicated Server		Gaming	caution	7.5k
:10543	MOS SOAP	TCPUDP	Web Services	safe	0
:10500	HIP NAT Traversal	UDP	Security	safe	0
:10540	MOS Media Object Metadata	TCPUDP	Media	caution	0
:10541	Media Object Server (MOS) Protocol — upper port	TCPUDP	Network Services	caution	0
:10544	MOS SOAP Optional Port	TCPUDP	Web Services	safe	0
:10548	Apple Document Sharing Service	TCP	File Transfer	safe	0

risk mix of the 7 listed

safe57%
caution43%

0 of 7 encrypted

Port :10542MOS Low Priority Port

Technical Details

Security Information

Related Ports

Port 10542MOS Low Priority Port