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// Other services

Port 11971: TiBS Service

Port 11971 is assigned by IANA to tibsd (TiBS Service).

11971

How tibsd works

Other services
client:11971tibsdresponse client:11971tibsdresponse

The client sends a request to port 11971 and the tibsd service answers.

Transport
TCP
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 11971 dangerous?

We have no specific security note for port 11971. 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 11971

ServicePortTransportDescriptionReferenceUpdated
tibsd 11971 TCP TiBS Service - 2019-05-17
-11971-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 11971, and is it reachable?

Linux

sudo ss -ltnup 'sport = :11971'      # process listening on 11971
sudo lsof -nP -i :11971

macOS

sudo lsof -nP -i :11971

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11971 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 11971
netstat -ano | findstr :11971

From another machine

nmap -p 11971 -sV <host>
nc -zv <host> 11971

Block it in the firewall

sudo ufw deny 11971/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 11971" -Direction Inbound -LocalPort 11971 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 11971 used for?

Port 11971 is assigned by IANA to tibsd (TiBS Service).

Is port 11971 TCP or UDP?

Port 11971 is registered for TCP.

Is it safe to open port 11971?

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 11971 is open?

On Linux run "ss -ltnup 'sport = :11971'", on macOS "lsof -nP -i :11971", and on Windows "netstat -ano | findstr :11971" to see the local process. From another machine, "nmap -p 11971 <host>" shows whether it is reachable.

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