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// Other services

Port 10201: Remote Server Control and Test Service

Port 10201 is assigned by IANA to rscs (Remote Server Control and Test Service), rsms (Remote Server Management Service).

10201

How rscs works

Other services
client:10201rscsresponse client:10201rscsresponse

The client sends a request to port 10201 and the rscs service answers.

Transport
UDP · TCP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 10201 dangerous?

We have no specific security note for port 10201. 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 10201

ServicePortTransportDescriptionReferenceUpdated
rscs 10201 UDP Remote Server Control and Test Service - 2009-03-06
rsms 10201 TCP Remote Server Management Service - 2009-03-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 10201, and is it reachable?

Linux

sudo ss -ltnup 'sport = :10201'      # process listening on 10201
sudo lsof -nP -i :10201

macOS

sudo lsof -nP -i :10201

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 10201 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 10201
netstat -ano | findstr :10201

From another machine

nmap -p 10201 -sV <host>
sudo nmap -sU -p 10201 <host>
nc -zv <host> 10201

Block it in the firewall

sudo ufw deny 10201/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 10201" -Direction Inbound -LocalPort 10201 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 10201 used for?

Port 10201 is assigned by IANA to rscs (Remote Server Control and Test Service), rsms (Remote Server Management Service).

Is port 10201 TCP or UDP?

Port 10201 is registered for UDP and TCP.

Is it safe to open port 10201?

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 10201 is open?

On Linux run "ss -ltnup 'sport = :10201'", on macOS "lsof -nP -i :10201", and on Windows "netstat -ano | findstr :10201" to see the local process. From another machine, "nmap -p 10201 <host>" shows whether it is reachable.

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