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// Other services

Port 4067: Information Distribution Protocol

Port 4067 is assigned by IANA to idp (Information Distribution Protocol).

4067

How idp works

Other services
client:4067idpresponse client:4067idpresponse

The client sends a request to port 4067 and the idp 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 4067 dangerous?

We have no specific security note for port 4067. 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 4067

ServicePortTransportDescriptionReferenceUpdated
idp 4067 TCP, UDP Information Distribution Protocol - 2007-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 4067, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4067'      # process listening on 4067
sudo lsof -nP -i :4067

macOS

sudo lsof -nP -i :4067

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4067 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4067
netstat -ano | findstr :4067

From another machine

nmap -p 4067 -sV <host>
sudo nmap -sU -p 4067 <host>
nc -zv <host> 4067

Block it in the firewall

sudo ufw deny 4067/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4067" -Direction Inbound -LocalPort 4067 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4067 used for?

Port 4067 is assigned by IANA to idp (Information Distribution Protocol).

Is port 4067 TCP or UDP?

Port 4067 is registered for TCP and UDP.

Is it safe to open port 4067?

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 4067 is open?

On Linux run "ss -ltnup 'sport = :4067'", on macOS "lsof -nP -i :4067", and on Windows "netstat -ano | findstr :4067" to see the local process. From another machine, "nmap -p 4067 <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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