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// Other services

Port 4009: Chimera HWM

Port 4009 is assigned by IANA to chimera-hwm (Chimera HWM).

4009

How chimera-hwm works

Other services
client:4009chimera-hwmresponse client:4009chimera-hwmresponse

The client sends a request to port 4009 and the chimera-hwm 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 4009 dangerous?

We have no specific security note for port 4009. 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 4009

ServicePortTransportDescriptionReferenceUpdated
chimera-hwm 4009 TCP, UDP Chimera HWM - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4009, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4009'      # process listening on 4009
sudo lsof -nP -i :4009

macOS

sudo lsof -nP -i :4009

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4009 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4009
netstat -ano | findstr :4009

From another machine

nmap -p 4009 -sV <host>
sudo nmap -sU -p 4009 <host>
nc -zv <host> 4009

Block it in the firewall

sudo ufw deny 4009/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4009" -Direction Inbound -LocalPort 4009 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4009 used for?

Port 4009 is assigned by IANA to chimera-hwm (Chimera HWM).

Is port 4009 TCP or UDP?

Port 4009 is registered for TCP and UDP.

Is it safe to open port 4009?

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 4009 is open?

On Linux run "ss -ltnup 'sport = :4009'", on macOS "lsof -nP -i :4009", and on Windows "netstat -ano | findstr :4009" to see the local process. From another machine, "nmap -p 4009 <host>" shows whether it is reachable.

05 Related
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