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// Other services

Port 14142: IceWall Cert Protocol

Port 14142 is assigned by IANA to icpp (IceWall Cert Protocol).

14142

How icpp works

Other services
client:14142icppresponse client:14142icppresponse

The client sends a request to port 14142 and the icpp 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 14142 dangerous?

We have no specific security note for port 14142. 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 14142

ServicePortTransportDescriptionReferenceUpdated
icpp 14142 TCP, UDP IceWall Cert Protocol - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 14142, and is it reachable?

Linux

sudo ss -ltnup 'sport = :14142'      # process listening on 14142
sudo lsof -nP -i :14142

macOS

sudo lsof -nP -i :14142

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 14142 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 14142
netstat -ano | findstr :14142

From another machine

nmap -p 14142 -sV <host>
sudo nmap -sU -p 14142 <host>
nc -zv <host> 14142

Block it in the firewall

sudo ufw deny 14142/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 14142" -Direction Inbound -LocalPort 14142 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 14142 used for?

Port 14142 is assigned by IANA to icpp (IceWall Cert Protocol).

Is port 14142 TCP or UDP?

Port 14142 is registered for TCP and UDP.

Is it safe to open port 14142?

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 14142 is open?

On Linux run "ss -ltnup 'sport = :14142'", on macOS "lsof -nP -i :14142", and on Windows "netstat -ano | findstr :14142" to see the local process. From another machine, "nmap -p 14142 <host>" shows whether it is reachable.

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