CyberHunter
Local dataset, no network
// Other services

Port 2071: Axon Control Protocol

Port 2071 is assigned by IANA to acp-port (Axon Control Protocol).

2071

How acp-port works

Other services
client:2071acp-portresponse client:2071acp-portresponse

The client sends a request to port 2071 and the acp-port 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 2071 dangerous?

We have no specific security note for port 2071. 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 2071

ServicePortTransportDescriptionReferenceUpdated
acp-port 2071 TCP, UDP Axon Control Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2071, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2071'      # process listening on 2071
sudo lsof -nP -i :2071

macOS

sudo lsof -nP -i :2071

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2071 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2071
netstat -ano | findstr :2071

From another machine

nmap -p 2071 -sV <host>
sudo nmap -sU -p 2071 <host>
nc -zv <host> 2071

Block it in the firewall

sudo ufw deny 2071/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2071" -Direction Inbound -LocalPort 2071 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2071 used for?

Port 2071 is assigned by IANA to acp-port (Axon Control Protocol).

Is port 2071 TCP or UDP?

Port 2071 is registered for TCP and UDP.

Is it safe to open port 2071?

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 2071 is open?

On Linux run "ss -ltnup 'sport = :2071'", on macOS "lsof -nP -i :2071", and on Windows "netstat -ano | findstr :2071" to see the local process. From another machine, "nmap -p 2071 <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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