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// Other services

Port 1682: lanyon-lantern

Port 1682 is assigned by IANA to lanyon-lantern (lanyon-lantern).

1682

How lanyon-lantern works

Other services
client:1682lanyon-lanternresponse client:1682lanyon-lanternresponse

The client sends a request to port 1682 and the lanyon-lantern 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 1682 dangerous?

We have no specific security note for port 1682. 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 1682

ServicePortTransportDescriptionReferenceUpdated
lanyon-lantern 1682 TCP, UDP lanyon-lantern - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1682, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1682'      # process listening on 1682
sudo lsof -nP -i :1682

macOS

sudo lsof -nP -i :1682

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1682 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1682
netstat -ano | findstr :1682

From another machine

nmap -p 1682 -sV <host>
sudo nmap -sU -p 1682 <host>
nc -zv <host> 1682

Block it in the firewall

sudo ufw deny 1682/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1682" -Direction Inbound -LocalPort 1682 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1682 used for?

Port 1682 is assigned by IANA to lanyon-lantern (lanyon-lantern).

Is port 1682 TCP or UDP?

Port 1682 is registered for TCP and UDP.

Is it safe to open port 1682?

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 1682 is open?

On Linux run "ss -ltnup 'sport = :1682'", on macOS "lsof -nP -i :1682", and on Windows "netstat -ano | findstr :1682" to see the local process. From another machine, "nmap -p 1682 <host>" shows whether it is reachable.

05 Related
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