CyberHunter
Local dataset, no network
// Other services

Port 2142: TDM OVER IP

Port 2142 is assigned by IANA to tdmoip (TDM OVER IP).

2142

How tdmoip works

Other services
client:2142tdmoipresponse client:2142tdmoipresponse

The client sends a request to port 2142 and the tdmoip 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 2142 dangerous?

We have no specific security note for port 2142. 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 2142

ServicePortTransportDescriptionReferenceUpdated
tdmoip 2142 TCP, UDP TDM OVER IP RFC 5087 2016-09-21

// source: IANA service name and port number registry

03 Check it

Which program uses port 2142, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2142'      # process listening on 2142
sudo lsof -nP -i :2142

macOS

sudo lsof -nP -i :2142

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2142 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2142
netstat -ano | findstr :2142

From another machine

nmap -p 2142 -sV <host>
sudo nmap -sU -p 2142 <host>
nc -zv <host> 2142

Block it in the firewall

sudo ufw deny 2142/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2142" -Direction Inbound -LocalPort 2142 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2142 used for?

Port 2142 is assigned by IANA to tdmoip (TDM OVER IP).

Is port 2142 TCP or UDP?

Port 2142 is registered for TCP and UDP.

Is it safe to open port 2142?

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 2142 is open?

On Linux run "ss -ltnup 'sport = :2142'", on macOS "lsof -nP -i :2142", and on Windows "netstat -ano | findstr :2142" to see the local process. From another machine, "nmap -p 2142 <host>" shows whether it is reachable.

05 Related
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