CyberHunter
Local dataset, no network
// Other services

Port 769:

Port 769 is assigned by IANA to vid ().

769

How vid works

Other services
client:769vidresponse client:769vidresponse

The client sends a request to port 769 and the vid 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 769 dangerous?

We have no specific security note for port 769. 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 769

ServicePortTransportDescriptionReferenceUpdated
vid 769 TCP, UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 769, and is it reachable?

Linux

sudo ss -ltnup 'sport = :769'      # process listening on 769
sudo lsof -nP -i :769

macOS

sudo lsof -nP -i :769

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 769 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 769
netstat -ano | findstr :769

From another machine

nmap -p 769 -sV <host>
sudo nmap -sU -p 769 <host>
nc -zv <host> 769

Block it in the firewall

sudo ufw deny 769/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 769" -Direction Inbound -LocalPort 769 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 769 used for?

Port 769 is assigned by IANA to vid ().

Is port 769 TCP or UDP?

Port 769 is registered for TCP and UDP.

Is it safe to open port 769?

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 769 is open?

On Linux run "ss -ltnup 'sport = :769'", on macOS "lsof -nP -i :769", and on Windows "netstat -ano | findstr :769" to see the local process. From another machine, "nmap -p 769 <host>" shows whether it is reachable.

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