- 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.
Port 11971: TiBS Service
Port 11971 is assigned by IANA to tibsd (TiBS Service).
11971
How tibsd works
Other servicesThe 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
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:
IANA registry entries for port 11971
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| tibsd | 11971 | TCP | TiBS Service | - | 2019-05-17 |
| - | 11971 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 11971, and is it reachable?
Linux
sudo ss -ltnup 'sport = :11971' # process listening on 11971
sudo lsof -nP -i :11971macOS
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
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.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp