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// Other services

Port 8320: Thin(ium) Network Protocol

Port 8320 is assigned by IANA to tnp-discover (Thin(ium) Network Protocol).

8320

How tnp-discover works

Other services
client:8320tnp-discoverresponse client:8320tnp-discoverresponse

The client sends a request to port 8320 and the tnp-discover 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 8320 dangerous?

We have no specific security note for port 8320. 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 8320

ServicePortTransportDescriptionReferenceUpdated
tnp-discover 8320 TCP, UDP Thin(ium) Network Protocol - 2007-08-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 8320, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8320'      # process listening on 8320
sudo lsof -nP -i :8320

macOS

sudo lsof -nP -i :8320

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8320 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8320
netstat -ano | findstr :8320

From another machine

nmap -p 8320 -sV <host>
sudo nmap -sU -p 8320 <host>
nc -zv <host> 8320

Block it in the firewall

sudo ufw deny 8320/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8320" -Direction Inbound -LocalPort 8320 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8320 used for?

Port 8320 is assigned by IANA to tnp-discover (Thin(ium) Network Protocol).

Is port 8320 TCP or UDP?

Port 8320 is registered for TCP and UDP.

Is it safe to open port 8320?

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 8320 is open?

On Linux run "ss -ltnup 'sport = :8320'", on macOS "lsof -nP -i :8320", and on Windows "netstat -ano | findstr :8320" to see the local process. From another machine, "nmap -p 8320 <host>" shows whether it is reachable.

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