CyberHunter
Local dataset, no network
// Other services

Port 2822: ka0wuc

Port 2822 is assigned by IANA to ka0wuc (ka0wuc).

2822

How ka0wuc works

Other services
client:2822ka0wucresponse client:2822ka0wucresponse

The client sends a request to port 2822 and the ka0wuc 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 2822 dangerous?

We have no specific security note for port 2822. 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 2822

ServicePortTransportDescriptionReferenceUpdated
ka0wuc 2822 TCP, UDP ka0wuc - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2822, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2822'      # process listening on 2822
sudo lsof -nP -i :2822

macOS

sudo lsof -nP -i :2822

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2822 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2822
netstat -ano | findstr :2822

From another machine

nmap -p 2822 -sV <host>
sudo nmap -sU -p 2822 <host>
nc -zv <host> 2822

Block it in the firewall

sudo ufw deny 2822/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2822" -Direction Inbound -LocalPort 2822 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2822 used for?

Port 2822 is assigned by IANA to ka0wuc (ka0wuc).

Is port 2822 TCP or UDP?

Port 2822 is registered for TCP and UDP.

Is it safe to open port 2822?

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 2822 is open?

On Linux run "ss -ltnup 'sport = :2822'", on macOS "lsof -nP -i :2822", and on Windows "netstat -ano | findstr :2822" to see the local process. From another machine, "nmap -p 2822 <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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