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// Other services

Port 22273: wnn6

Port 22273 is assigned by IANA to wnn6 (wnn6).

22273

How wnn6 works

Other services
client:22273wnn6response client:22273wnn6response

The client sends a request to port 22273 and the wnn6 service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 22273 dangerous?

We have no specific security note for port 22273. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 22273

ServicePortTransportDescriptionReferenceUpdated
wnn6 22273 TCP, UDP wnn6 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 22273, and is it reachable?

Linux

sudo ss -ltnup 'sport = :22273'      # process listening on 22273
sudo lsof -nP -i :22273

macOS

sudo lsof -nP -i :22273

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 22273 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 22273
netstat -ano | findstr :22273

From another machine

nmap -p 22273 -sV <host>
sudo nmap -sU -p 22273 <host>
nc -zv <host> 22273

Block it in the firewall

sudo ufw deny 22273/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 22273" -Direction Inbound -LocalPort 22273 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 22273 used for?

Port 22273 is assigned by IANA to wnn6 (wnn6).

Is port 22273 TCP or UDP?

Port 22273 is registered for TCP and UDP.

Is it safe to open port 22273?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 22273 is open?

On Linux run "ss -ltnup 'sport = :22273'", on macOS "lsof -nP -i :22273", and on Windows "netstat -ano | findstr :22273" to see the local process. From another machine, "nmap -p 22273 <host>" shows whether it is reachable.

05 Related
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