CyberHunter
Local dataset, no network
// Other services

Port 622: Collaborator

Port 622 is assigned by IANA to collaborator (Collaborator).

622

How collaborator works

Other services
client:622collaboratorresponse client:622collaboratorresponse

The client sends a request to port 622 and the collaborator 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 622 dangerous?

We have no specific security note for port 622. 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 622

ServicePortTransportDescriptionReferenceUpdated
collaborator 622 TCP, UDP Collaborator - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 622, and is it reachable?

Linux

sudo ss -ltnup 'sport = :622'      # process listening on 622
sudo lsof -nP -i :622

macOS

sudo lsof -nP -i :622

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 622 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 622
netstat -ano | findstr :622

From another machine

nmap -p 622 -sV <host>
sudo nmap -sU -p 622 <host>
nc -zv <host> 622

Block it in the firewall

sudo ufw deny 622/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 622" -Direction Inbound -LocalPort 622 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 622 used for?

Port 622 is assigned by IANA to collaborator (Collaborator).

Is port 622 TCP or UDP?

Port 622 is registered for TCP and UDP.

Is it safe to open port 622?

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 622 is open?

On Linux run "ss -ltnup 'sport = :622'", on macOS "lsof -nP -i :622", and on Windows "netstat -ano | findstr :622" to see the local process. From another machine, "nmap -p 622 <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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