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// Other services

Port 2258: Rotorcraft Communications Test System

Port 2258 is assigned by IANA to rcts (Rotorcraft Communications Test System).

2258

How rcts works

Other services
client:2258rctsresponse client:2258rctsresponse

The client sends a request to port 2258 and the rcts 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 2258 dangerous?

We have no specific security note for port 2258. 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 2258

ServicePortTransportDescriptionReferenceUpdated
rcts 2258 TCP, UDP Rotorcraft Communications Test System - 2006-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 2258, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2258'      # process listening on 2258
sudo lsof -nP -i :2258

macOS

sudo lsof -nP -i :2258

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2258 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2258
netstat -ano | findstr :2258

From another machine

nmap -p 2258 -sV <host>
sudo nmap -sU -p 2258 <host>
nc -zv <host> 2258

Block it in the firewall

sudo ufw deny 2258/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2258" -Direction Inbound -LocalPort 2258 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2258 used for?

Port 2258 is assigned by IANA to rcts (Rotorcraft Communications Test System).

Is port 2258 TCP or UDP?

Port 2258 is registered for TCP and UDP.

Is it safe to open port 2258?

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 2258 is open?

On Linux run "ss -ltnup 'sport = :2258'", on macOS "lsof -nP -i :2258", and on Windows "netstat -ano | findstr :2258" to see the local process. From another machine, "nmap -p 2258 <host>" shows whether it is reachable.

05 Related
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