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// Other services

Port 1212: lupa

Port 1212 is assigned by IANA to lupa (lupa).

1212

How lupa works

Other services
client:1212luparesponse client:1212luparesponse

The client sends a request to port 1212 and the lupa 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 1212 dangerous?

We have no specific security note for port 1212. 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 1212

ServicePortTransportDescriptionReferenceUpdated
lupa 1212 TCP, UDP lupa - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1212, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1212'      # process listening on 1212
sudo lsof -nP -i :1212

macOS

sudo lsof -nP -i :1212

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1212 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1212
netstat -ano | findstr :1212

From another machine

nmap -p 1212 -sV <host>
sudo nmap -sU -p 1212 <host>
nc -zv <host> 1212

Block it in the firewall

sudo ufw deny 1212/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1212" -Direction Inbound -LocalPort 1212 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1212 used for?

Port 1212 is assigned by IANA to lupa (lupa).

Is port 1212 TCP or UDP?

Port 1212 is registered for TCP and UDP.

Is it safe to open port 1212?

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 1212 is open?

On Linux run "ss -ltnup 'sport = :1212'", on macOS "lsof -nP -i :1212", and on Windows "netstat -ano | findstr :1212" to see the local process. From another machine, "nmap -p 1212 <host>" shows whether it is reachable.

05 Related
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