CyberHunter
Local dataset, no network
// Other services

Port 4340: Gaia Connector Protocol

Port 4340 is assigned by IANA to gaia (Gaia Connector Protocol).

4340

How gaia works

Other services
client:4340gaiaresponse client:4340gaiaresponse

The client sends a request to port 4340 and the gaia 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 4340 dangerous?

We have no specific security note for port 4340. 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 4340

ServicePortTransportDescriptionReferenceUpdated
gaia 4340 TCP, UDP Gaia Connector Protocol - 2007-11-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 4340, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4340'      # process listening on 4340
sudo lsof -nP -i :4340

macOS

sudo lsof -nP -i :4340

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4340 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4340
netstat -ano | findstr :4340

From another machine

nmap -p 4340 -sV <host>
sudo nmap -sU -p 4340 <host>
nc -zv <host> 4340

Block it in the firewall

sudo ufw deny 4340/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4340" -Direction Inbound -LocalPort 4340 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4340 used for?

Port 4340 is assigned by IANA to gaia (Gaia Connector Protocol).

Is port 4340 TCP or UDP?

Port 4340 is registered for TCP and UDP.

Is it safe to open port 4340?

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 4340 is open?

On Linux run "ss -ltnup 'sport = :4340'", on macOS "lsof -nP -i :4340", and on Windows "netstat -ano | findstr :4340" to see the local process. From another machine, "nmap -p 4340 <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

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