CyberHunter
Local dataset, no network
// Other services

Port 2841: l3-ranger

Port 2841 is assigned by IANA to l3-ranger (l3-ranger).

2841

How l3-ranger works

Other services
client:2841l3-rangerresponse client:2841l3-rangerresponse

The client sends a request to port 2841 and the l3-ranger 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 2841 dangerous?

We have no specific security note for port 2841. 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 2841

ServicePortTransportDescriptionReferenceUpdated
l3-ranger 2841 TCP, UDP l3-ranger - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2841, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2841'      # process listening on 2841
sudo lsof -nP -i :2841

macOS

sudo lsof -nP -i :2841

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2841 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2841
netstat -ano | findstr :2841

From another machine

nmap -p 2841 -sV <host>
sudo nmap -sU -p 2841 <host>
nc -zv <host> 2841

Block it in the firewall

sudo ufw deny 2841/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2841" -Direction Inbound -LocalPort 2841 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2841 used for?

Port 2841 is assigned by IANA to l3-ranger (l3-ranger).

Is port 2841 TCP or UDP?

Port 2841 is registered for TCP and UDP.

Is it safe to open port 2841?

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 2841 is open?

On Linux run "ss -ltnup 'sport = :2841'", on macOS "lsof -nP -i :2841", and on Windows "netstat -ano | findstr :2841" to see the local process. From another machine, "nmap -p 2841 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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