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// Other services

Port 2371: Remote Device Access

Port 2371 is assigned by IANA to rda (Remote Device Access).

2371

How rda works

Other services
client:2371rdaresponse client:2371rdaresponse

The client sends a request to port 2371 and the rda service answers.

Transport
TCP
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 2371 dangerous?

We have no specific security note for port 2371. 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 2371

ServicePortTransportDescriptionReferenceUpdated
rda 2371 TCP Remote Device Access - 2018-11-05
-2371-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 2371, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2371'      # process listening on 2371
sudo lsof -nP -i :2371

macOS

sudo lsof -nP -i :2371

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2371 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2371
netstat -ano | findstr :2371

From another machine

nmap -p 2371 -sV <host>
nc -zv <host> 2371

Block it in the firewall

sudo ufw deny 2371/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2371" -Direction Inbound -LocalPort 2371 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2371 used for?

Port 2371 is assigned by IANA to rda (Remote Device Access).

Is port 2371 TCP or UDP?

Port 2371 is registered for TCP.

Is it safe to open port 2371?

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 2371 is open?

On Linux run "ss -ltnup 'sport = :2371'", on macOS "lsof -nP -i :2371", and on Windows "netstat -ano | findstr :2371" to see the local process. From another machine, "nmap -p 2371 <host>" shows whether it is reachable.

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