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// Other services

Port 2842: l3-hawk

Port 2842 is assigned by IANA to l3-hawk (l3-hawk).

2842

How l3-hawk works

Other services
client:2842l3-hawkresponse client:2842l3-hawkresponse

The client sends a request to port 2842 and the l3-hawk 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 2842 dangerous?

We have no specific security note for port 2842. 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 2842

ServicePortTransportDescriptionReferenceUpdated
l3-hawk 2842 TCP, UDP l3-hawk - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2842, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2842'      # process listening on 2842
sudo lsof -nP -i :2842

macOS

sudo lsof -nP -i :2842

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2842 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2842
netstat -ano | findstr :2842

From another machine

nmap -p 2842 -sV <host>
sudo nmap -sU -p 2842 <host>
nc -zv <host> 2842

Block it in the firewall

sudo ufw deny 2842/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2842" -Direction Inbound -LocalPort 2842 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2842 used for?

Port 2842 is assigned by IANA to l3-hawk (l3-hawk).

Is port 2842 TCP or UDP?

Port 2842 is registered for TCP and UDP.

Is it safe to open port 2842?

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 2842 is open?

On Linux run "ss -ltnup 'sport = :2842'", on macOS "lsof -nP -i :2842", and on Windows "netstat -ano | findstr :2842" to see the local process. From another machine, "nmap -p 2842 <host>" shows whether it is reachable.

05 Related
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