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// Other services

Port 2158: TouchNetPlus Service

Port 2158 is assigned by IANA to touchnetplus (TouchNetPlus Service).

2158

How touchnetplus works

Other services
client:2158touchnetplusresponse client:2158touchnetplusresponse

The client sends a request to port 2158 and the touchnetplus 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 2158 dangerous?

We have no specific security note for port 2158. 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 2158

ServicePortTransportDescriptionReferenceUpdated
touchnetplus 2158 TCP, UDP TouchNetPlus Service - 2008-03-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 2158, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2158'      # process listening on 2158
sudo lsof -nP -i :2158

macOS

sudo lsof -nP -i :2158

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2158 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2158
netstat -ano | findstr :2158

From another machine

nmap -p 2158 -sV <host>
sudo nmap -sU -p 2158 <host>
nc -zv <host> 2158

Block it in the firewall

sudo ufw deny 2158/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2158" -Direction Inbound -LocalPort 2158 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2158 used for?

Port 2158 is assigned by IANA to touchnetplus (TouchNetPlus Service).

Is port 2158 TCP or UDP?

Port 2158 is registered for TCP and UDP.

Is it safe to open port 2158?

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 2158 is open?

On Linux run "ss -ltnup 'sport = :2158'", on macOS "lsof -nP -i :2158", and on Windows "netstat -ano | findstr :2158" to see the local process. From another machine, "nmap -p 2158 <host>" shows whether it is reachable.

05 Related
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