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Local dataset, no network
// Other services

Port 2237: Optech Port1 License Manager

Port 2237 is assigned by IANA to optech-port1-lm (Optech Port1 License Manager).

2237

How optech-port1-lm works

Other services
client:2237optech-port1-lmresponse client:2237optech-port1-lmresponse

The client sends a request to port 2237 and the optech-port1-lm 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 2237 dangerous?

We have no specific security note for port 2237. 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 2237

ServicePortTransportDescriptionReferenceUpdated
optech-port1-lm 2237 TCP, UDP Optech Port1 License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2237, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2237'      # process listening on 2237
sudo lsof -nP -i :2237

macOS

sudo lsof -nP -i :2237

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2237 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2237
netstat -ano | findstr :2237

From another machine

nmap -p 2237 -sV <host>
sudo nmap -sU -p 2237 <host>
nc -zv <host> 2237

Block it in the firewall

sudo ufw deny 2237/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2237" -Direction Inbound -LocalPort 2237 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2237 used for?

Port 2237 is assigned by IANA to optech-port1-lm (Optech Port1 License Manager).

Is port 2237 TCP or UDP?

Port 2237 is registered for TCP and UDP.

Is it safe to open port 2237?

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 2237 is open?

On Linux run "ss -ltnup 'sport = :2237'", on macOS "lsof -nP -i :2237", and on Windows "netstat -ano | findstr :2237" to see the local process. From another machine, "nmap -p 2237 <host>" shows whether it is reachable.

05 Related
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