CyberHunter
Local dataset, no network
// Other services

Port 2370: L3-HBMon

Port 2370 is assigned by IANA to l3-hbmon (L3-HBMon).

2370

How l3-hbmon works

Other services
client:2370l3-hbmonresponse client:2370l3-hbmonresponse

The client sends a request to port 2370 and the l3-hbmon 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 2370 dangerous?

We have no specific security note for port 2370. 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 2370

ServicePortTransportDescriptionReferenceUpdated
l3-hbmon 2370 TCP, UDP L3-HBMon - 2014-04-09

// source: IANA service name and port number registry

03 Check it

Which program uses port 2370, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2370'      # process listening on 2370
sudo lsof -nP -i :2370

macOS

sudo lsof -nP -i :2370

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2370 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2370
netstat -ano | findstr :2370

From another machine

nmap -p 2370 -sV <host>
sudo nmap -sU -p 2370 <host>
nc -zv <host> 2370

Block it in the firewall

sudo ufw deny 2370/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2370" -Direction Inbound -LocalPort 2370 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2370 used for?

Port 2370 is assigned by IANA to l3-hbmon (L3-HBMon).

Is port 2370 TCP or UDP?

Port 2370 is registered for TCP and UDP.

Is it safe to open port 2370?

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 2370 is open?

On Linux run "ss -ltnup 'sport = :2370'", on macOS "lsof -nP -i :2370", and on Windows "netstat -ano | findstr :2370" to see the local process. From another machine, "nmap -p 2370 <host>" shows whether it is reachable.

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