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// Other services

Port 1692: sstsys-lm

Port 1692 is assigned by IANA to sstsys-lm (sstsys-lm).

1692

How sstsys-lm works

Other services
client:1692sstsys-lmresponse client:1692sstsys-lmresponse

The client sends a request to port 1692 and the sstsys-lm 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 1692 dangerous?

We have no specific security note for port 1692. 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 1692

ServicePortTransportDescriptionReferenceUpdated
sstsys-lm 1692 TCP, UDP sstsys-lm - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1692, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1692'      # process listening on 1692
sudo lsof -nP -i :1692

macOS

sudo lsof -nP -i :1692

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1692 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1692
netstat -ano | findstr :1692

From another machine

nmap -p 1692 -sV <host>
sudo nmap -sU -p 1692 <host>
nc -zv <host> 1692

Block it in the firewall

sudo ufw deny 1692/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1692" -Direction Inbound -LocalPort 1692 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1692 used for?

Port 1692 is assigned by IANA to sstsys-lm (sstsys-lm).

Is port 1692 TCP or UDP?

Port 1692 is registered for TCP and UDP.

Is it safe to open port 1692?

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 1692 is open?

On Linux run "ss -ltnup 'sport = :1692'", on macOS "lsof -nP -i :1692", and on Windows "netstat -ano | findstr :1692" to see the local process. From another machine, "nmap -p 1692 <host>" shows whether it is reachable.

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