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// Other services

Port 2576: TCL Pro Debugger

Port 2576 is assigned by IANA to tclprodebugger (TCL Pro Debugger).

2576

How tclprodebugger works

Other services
client:2576tclprodebuggerresponse client:2576tclprodebuggerresponse

The client sends a request to port 2576 and the tclprodebugger 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 2576 dangerous?

We have no specific security note for port 2576. 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 2576

ServicePortTransportDescriptionReferenceUpdated
tclprodebugger 2576 TCP, UDP TCL Pro Debugger - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2576, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2576'      # process listening on 2576
sudo lsof -nP -i :2576

macOS

sudo lsof -nP -i :2576

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2576 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2576
netstat -ano | findstr :2576

From another machine

nmap -p 2576 -sV <host>
sudo nmap -sU -p 2576 <host>
nc -zv <host> 2576

Block it in the firewall

sudo ufw deny 2576/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2576" -Direction Inbound -LocalPort 2576 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2576 used for?

Port 2576 is assigned by IANA to tclprodebugger (TCL Pro Debugger).

Is port 2576 TCP or UDP?

Port 2576 is registered for TCP and UDP.

Is it safe to open port 2576?

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 2576 is open?

On Linux run "ss -ltnup 'sport = :2576'", on macOS "lsof -nP -i :2576", and on Windows "netstat -ano | findstr :2576" to see the local process. From another machine, "nmap -p 2576 <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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