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

Port 3632: distributed compiler

Port 3632 is assigned by IANA to distcc (distributed compiler).

3632

How distcc works

Other services
client:3632distccresponse client:3632distccresponse

The client sends a request to port 3632 and the distcc 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 3632 dangerous?

We have no specific security note for port 3632. 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 3632

ServicePortTransportDescriptionReferenceUpdated
distcc 3632 TCP, UDP distributed compiler - 2002-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 3632, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3632'      # process listening on 3632
sudo lsof -nP -i :3632

macOS

sudo lsof -nP -i :3632

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3632 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3632
netstat -ano | findstr :3632

From another machine

nmap -p 3632 -sV <host>
sudo nmap -sU -p 3632 <host>
nc -zv <host> 3632

Block it in the firewall

sudo ufw deny 3632/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3632" -Direction Inbound -LocalPort 3632 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3632 used for?

Port 3632 is assigned by IANA to distcc (distributed compiler).

Is port 3632 TCP or UDP?

Port 3632 is registered for TCP and UDP.

Is it safe to open port 3632?

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 3632 is open?

On Linux run "ss -ltnup 'sport = :3632'", on macOS "lsof -nP -i :3632", and on Windows "netstat -ano | findstr :3632" to see the local process. From another machine, "nmap -p 3632 <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