CyberHunter
Local dataset, no network
// Other services

Port 4146: TGCConnect Beacon

Port 4146 is assigned by IANA to tgcconnect (TGCConnect Beacon).

4146

How tgcconnect works

Other services
client:4146tgcconnectresponse client:4146tgcconnectresponse

The client sends a request to port 4146 and the tgcconnect 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 4146 dangerous?

We have no specific security note for port 4146. 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 4146

ServicePortTransportDescriptionReferenceUpdated
tgcconnect 4146 TCP, UDP TGCConnect Beacon - 2006-10

// source: IANA service name and port number registry

03 Check it

Which program uses port 4146, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4146'      # process listening on 4146
sudo lsof -nP -i :4146

macOS

sudo lsof -nP -i :4146

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4146 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4146
netstat -ano | findstr :4146

From another machine

nmap -p 4146 -sV <host>
sudo nmap -sU -p 4146 <host>
nc -zv <host> 4146

Block it in the firewall

sudo ufw deny 4146/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4146" -Direction Inbound -LocalPort 4146 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4146 used for?

Port 4146 is assigned by IANA to tgcconnect (TGCConnect Beacon).

Is port 4146 TCP or UDP?

Port 4146 is registered for TCP and UDP.

Is it safe to open port 4146?

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 4146 is open?

On Linux run "ss -ltnup 'sport = :4146'", on macOS "lsof -nP -i :4146", and on Windows "netstat -ano | findstr :4146" to see the local process. From another machine, "nmap -p 4146 <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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