Port 1843netopia-vo5

An obscure IANA-assigned service named netopia-vo5, registered to Marc Epard on TCP and UDP port 1843.

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

Technical Details

what runs on :1843

netopia-vo5 is registered on port :1843 over tcp and udp to Marc Epard. 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 :1843

this machine

# linux
sudo ss -tulpn 'sport = :1843'

# macos / bsd
sudo lsof -nP -i :1843

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1843

another host

nmap -sV -p T:1843 <host>
sudo nmap -sU -sV -p U:1843 <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 :1843

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 :1843 yet

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

Record

iana registry entry

port: :1843
service: netopia-vo5
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: netopia-vo5 is an IANA service assignment for TCP and UDP port 1843, registered to Marc Epard. No public protocol or deployment details are recorded, and it has never been observed open in Nmap's internet-wide scan data.
lookups: 0rank 993
added: 2026-09-19
updated: 2026-09-19
references: IANA service name registry — port 1843

Something wrong?

This record is maintained by the engineers who use port 1843. 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 2026-09-19.

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 :1843, by lookups.

port	service	proto	category	risk	views
:1863	Microsoft Notification Protocol	TCP	Voice and Chat	caution	15.9k
:1900	SSDP / UPnP Discovery	UDP	Network Services	caution	14.6k
:1883	MQTT Broker	TCP	Network Services	caution	14.2k
:1812	RADIUS Auth Protocol	TCPUDP	Security	caution	12.0k
:1886	Leonardo over IP	TCP	File Transfer	caution	10.4k
:1801	MSMQ	TCPUDP	Network Services	caution	8.9k
:1813	RADIUS Accounting	TCPUDP	Security	caution	7.2k
:1840	Netopia VO2	TCPUDP	—	safe	0

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :1843netopia-vo5

Technical Details

Security Information

Related Ports

Port 1843netopia-vo5