CyberHunter
Local dataset, no network
// Other services

Port 3168: Now Up-to-Date Public Server

Port 3168 is assigned by IANA to poweronnud (Now Up-to-Date Public Server).

3168

How poweronnud works

Other services
client:3168poweronnudresponse client:3168poweronnudresponse

The client sends a request to port 3168 and the poweronnud 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 3168 dangerous?

We have no specific security note for port 3168. 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 3168

ServicePortTransportDescriptionReferenceUpdated
poweronnud 3168 TCP, UDP Now Up-to-Date Public Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3168, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3168'      # process listening on 3168
sudo lsof -nP -i :3168

macOS

sudo lsof -nP -i :3168

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3168 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3168
netstat -ano | findstr :3168

From another machine

nmap -p 3168 -sV <host>
sudo nmap -sU -p 3168 <host>
nc -zv <host> 3168

Block it in the firewall

sudo ufw deny 3168/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3168" -Direction Inbound -LocalPort 3168 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3168 used for?

Port 3168 is assigned by IANA to poweronnud (Now Up-to-Date Public Server).

Is port 3168 TCP or UDP?

Port 3168 is registered for TCP and UDP.

Is it safe to open port 3168?

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 3168 is open?

On Linux run "ss -ltnup 'sport = :3168'", on macOS "lsof -nP -i :3168", and on Windows "netstat -ano | findstr :3168" to see the local process. From another machine, "nmap -p 3168 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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