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// Other services

Port 1969: LIPSinc 1

Port 1969 is assigned by IANA to lipsinc1 (LIPSinc 1).

1969

How lipsinc1 works

Other services
client:1969lipsinc1response client:1969lipsinc1response

The client sends a request to port 1969 and the lipsinc1 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 1969 dangerous?

We have no specific security note for port 1969. 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 1969

ServicePortTransportDescriptionReferenceUpdated
lipsinc1 1969 TCP, UDP LIPSinc 1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1969, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1969'      # process listening on 1969
sudo lsof -nP -i :1969

macOS

sudo lsof -nP -i :1969

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1969 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1969
netstat -ano | findstr :1969

From another machine

nmap -p 1969 -sV <host>
sudo nmap -sU -p 1969 <host>
nc -zv <host> 1969

Block it in the firewall

sudo ufw deny 1969/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1969" -Direction Inbound -LocalPort 1969 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1969 used for?

Port 1969 is assigned by IANA to lipsinc1 (LIPSinc 1).

Is port 1969 TCP or UDP?

Port 1969 is registered for TCP and UDP.

Is it safe to open port 1969?

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 1969 is open?

On Linux run "ss -ltnup 'sport = :1969'", on macOS "lsof -nP -i :1969", and on Windows "netstat -ano | findstr :1969" to see the local process. From another machine, "nmap -p 1969 <host>" shows whether it is reachable.

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