CyberHunter
Local dataset, no network
// Other services

Port 7628: Primary Agent Work Notification

Port 7628 is assigned by IANA to zen-pawn (Primary Agent Work Notification).

7628

How zen-pawn works

Other services
client:7628zen-pawnresponse client:7628zen-pawnresponse

The client sends a request to port 7628 and the zen-pawn 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 7628 dangerous?

We have no specific security note for port 7628. 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 7628

ServicePortTransportDescriptionReferenceUpdated
zen-pawn 7628 TCP, UDP Primary Agent Work Notification - 2006-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 7628, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7628'      # process listening on 7628
sudo lsof -nP -i :7628

macOS

sudo lsof -nP -i :7628

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7628 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7628
netstat -ano | findstr :7628

From another machine

nmap -p 7628 -sV <host>
sudo nmap -sU -p 7628 <host>
nc -zv <host> 7628

Block it in the firewall

sudo ufw deny 7628/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7628" -Direction Inbound -LocalPort 7628 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7628 used for?

Port 7628 is assigned by IANA to zen-pawn (Primary Agent Work Notification).

Is port 7628 TCP or UDP?

Port 7628 is registered for TCP and UDP.

Is it safe to open port 7628?

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 7628 is open?

On Linux run "ss -ltnup 'sport = :7628'", on macOS "lsof -nP -i :7628", and on Windows "netstat -ano | findstr :7628" to see the local process. From another machine, "nmap -p 7628 <host>" shows whether it is reachable.

05 Related
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