CyberHunter
Local dataset, no network
// Other services

Port 8764: OPENQUEUE

Port 8764 is assigned by IANA to openqueue (OPENQUEUE).

8764

How openqueue works

Other services
client:8764openqueueresponse client:8764openqueueresponse

The client sends a request to port 8764 and the openqueue 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 8764 dangerous?

We have no specific security note for port 8764. 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 8764

ServicePortTransportDescriptionReferenceUpdated
openqueue 8764 TCP, UDP OPENQUEUE - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8764, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8764'      # process listening on 8764
sudo lsof -nP -i :8764

macOS

sudo lsof -nP -i :8764

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8764 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8764
netstat -ano | findstr :8764

From another machine

nmap -p 8764 -sV <host>
sudo nmap -sU -p 8764 <host>
nc -zv <host> 8764

Block it in the firewall

sudo ufw deny 8764/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8764" -Direction Inbound -LocalPort 8764 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8764 used for?

Port 8764 is assigned by IANA to openqueue (OPENQUEUE).

Is port 8764 TCP or UDP?

Port 8764 is registered for TCP and UDP.

Is it safe to open port 8764?

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 8764 is open?

On Linux run "ss -ltnup 'sport = :8764'", on macOS "lsof -nP -i :8764", and on Windows "netstat -ano | findstr :8764" to see the local process. From another machine, "nmap -p 8764 <host>" shows whether it is reachable.

05 Related
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