Port 4732OHM server trigger

UDP port assigned to the OHM server trigger service; no common public deployment is known.

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

also known as ohmtrigger

Technical Details

what runs on :4732

OHM server trigger is registered on port :4732 over udp to Franck Lefevre, assigned November 2009. 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 :4732

this machine

# linux
sudo ss -ulpn 'sport = :4732'

# macos / bsd
sudo lsof -nP -i :4732

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4732

another host

sudo nmap -sU -sV -p U:4732 <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 :4732

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

udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :4732 yet

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

Record

iana registry entry

port: :4732
service: OHM server trigger
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns UDP/4732 to “OHM server trigger,” registered by Franck Lefevre in 2009. No widely recognized implementation or routine public deployment is established.
lookups: 0rank 993
added: 2026-10-05
updated: 2026-10-05
references: IANA service name registry — port 4732

Something wrong?

This record is maintained by the engineers who use port 4732. 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 2026-10-05.

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 :4732, by lookups.

port	service	proto	category	risk	views
:4712	McAfee Web Gateway GUI	TCPtls	Web Services	caution	24.8k
:4711	McAfee Web Gateway HTTP GUI	TCP	Web Services	caution	22.3k
:4747	Apprentice	TCP	Remote Access	caution	11.6k
:4728	CA DMP / Port Multiplexer	TCP	Network Services	caution	10.0k
:4750	BladeLogic Agent	TCP	Network Services	caution	8.7k
:4672	eMule UDP Port	UDP	File Transfer	caution	5.1k
:4692	Conspiracy messaging	TCPUDP	Voice and Chat	safe	0
:4691	Monotone Netsync Protocol	TCPUDP	Network Services	caution	0

risk mix of the 8 listed

safe13%
caution88%

1 of 8 encrypted

Port :4732OHM server trigger

Technical Details

Security Information

Related Ports

Port 4732OHM server trigger