CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 43191: Reconnoiter Agent Data Transport

Port 43191 is assigned by IANA to noit-transport (Reconnoiter Agent Data Transport).

43191

How noit-transport works

Other services
client:43191noit-transportresponse client:43191noit-transportresponse

The client sends a request to port 43191 and the noit-transport 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 43191 dangerous?

We have no specific security note for port 43191. 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 43191

ServicePortTransportDescriptionReferenceUpdated
noit-transport 43191 TCP Reconnoiter Agent Data Transport - 2009-05-19
-43191-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 43191, and is it reachable?

Linux

sudo ss -ltnup 'sport = :43191'      # process listening on 43191
sudo lsof -nP -i :43191

macOS

sudo lsof -nP -i :43191

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 43191 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 43191
netstat -ano | findstr :43191

From another machine

nmap -p 43191 -sV <host>
nc -zv <host> 43191

Block it in the firewall

sudo ufw deny 43191/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 43191" -Direction Inbound -LocalPort 43191 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 43191 used for?

Port 43191 is assigned by IANA to noit-transport (Reconnoiter Agent Data Transport).

Is port 43191 TCP or UDP?

Port 43191 is registered for TCP.

Is it safe to open port 43191?

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 43191 is open?

On Linux run "ss -ltnup 'sport = :43191'", on macOS "lsof -nP -i :43191", and on Windows "netstat -ano | findstr :43191" to see the local process. From another machine, "nmap -p 43191 <host>" shows whether it is reachable.

05 Related
: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

Latest vulnerability news

All news