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// Other services

Port 3672: LispWorks ORB

Port 3672 is assigned by IANA to lispworks-orb (LispWorks ORB).

3672

How lispworks-orb works

Other services
client:3672lispworks-orbresponse client:3672lispworks-orbresponse

The client sends a request to port 3672 and the lispworks-orb 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 3672 dangerous?

We have no specific security note for port 3672. 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 3672

ServicePortTransportDescriptionReferenceUpdated
lispworks-orb 3672 TCP, UDP LispWorks ORB - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3672, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3672'      # process listening on 3672
sudo lsof -nP -i :3672

macOS

sudo lsof -nP -i :3672

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3672 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3672
netstat -ano | findstr :3672

From another machine

nmap -p 3672 -sV <host>
sudo nmap -sU -p 3672 <host>
nc -zv <host> 3672

Block it in the firewall

sudo ufw deny 3672/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3672" -Direction Inbound -LocalPort 3672 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3672 used for?

Port 3672 is assigned by IANA to lispworks-orb (LispWorks ORB).

Is port 3672 TCP or UDP?

Port 3672 is registered for TCP and UDP.

Is it safe to open port 3672?

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 3672 is open?

On Linux run "ss -ltnup 'sport = :3672'", on macOS "lsof -nP -i :3672", and on Windows "netstat -ano | findstr :3672" to see the local process. From another machine, "nmap -p 3672 <host>" shows whether it is reachable.

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