CyberHunter
Local dataset, no network
// Other services

Port 1846: Tunstall PNC

Port 1846 is assigned by IANA to tunstall-pnc (Tunstall PNC).

1846

How tunstall-pnc works

Other services
client:1846tunstall-pncresponse client:1846tunstall-pncresponse

The client sends a request to port 1846 and the tunstall-pnc 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 1846 dangerous?

We have no specific security note for port 1846. 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 1846

ServicePortTransportDescriptionReferenceUpdated
tunstall-pnc 1846 TCP, UDP Tunstall PNC - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1846, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1846'      # process listening on 1846
sudo lsof -nP -i :1846

macOS

sudo lsof -nP -i :1846

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1846 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1846
netstat -ano | findstr :1846

From another machine

nmap -p 1846 -sV <host>
sudo nmap -sU -p 1846 <host>
nc -zv <host> 1846

Block it in the firewall

sudo ufw deny 1846/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1846" -Direction Inbound -LocalPort 1846 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1846 used for?

Port 1846 is assigned by IANA to tunstall-pnc (Tunstall PNC).

Is port 1846 TCP or UDP?

Port 1846 is registered for TCP and UDP.

Is it safe to open port 1846?

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 1846 is open?

On Linux run "ss -ltnup 'sport = :1846'", on macOS "lsof -nP -i :1846", and on Windows "netstat -ano | findstr :1846" to see the local process. From another machine, "nmap -p 1846 <host>" shows whether it is reachable.

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