Port 1232first-defense

Port 1232 is assigned to First Defense for remote systems monitoring.

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

Technical Details

what runs on :1232

first-defense is registered on port :1232 over tcp and udp to Nexum, assigned September 2012. 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 :1232

this machine

# linux
sudo ss -tulpn 'sport = :1232'

# macos / bsd
sudo lsof -nP -i :1232

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1232

another host

nmap -sV -p T:1232 <host>
sudo nmap -sU -sV -p U:1232 <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 :1232

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 :1232 yet

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

Record

iana registry entry

port: :1232
service: first-defense
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 1232 to Nexum for remote systems monitoring. IANA notes that Microsoft was unofficially using port 1232, but the assignment is not reported as unauthorized and has never been observed open in Nmap internet-wide scan data.
lookups: 0rank 993
added: 2026-09-17
updated: 2026-09-17
references: IANA service name registry — port 1232

Something wrong?

This record is maintained by the engineers who use port 1232. 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 2026-09-17.

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 :1232, by lookups.

port	service	proto	category	risk	views
:1220	QTSS Admin	TCP	Streaming	safe	20.6k
:1293	IPSec	TCPUDPtls	Security	caution	17.8k
:1270	SCOM Agent	TCPUDP	Network Services	caution	15.6k
:1200	SCOL Name Service	TCP	Network Services	caution	15.5k
:1236	Symantec BindView UNIX Mgmt	TCP	Security	caution	14.7k
:1200	Steam Friends Applet	UDP	Gaming	caution	13.0k
:1182	AcceleNet ITP	TCPUDP	Network Services	caution	12.4k
:1234	VLC RTP Streaming	UDP	Streaming	safe	11.7k

risk mix of the 8 listed

safe25%
caution75%

1 of 8 encrypted

Port :1232first-defense

Technical Details

Security Information

Related Ports

Port 1232first-defense