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// Other services

Port 2154: Standard Protocol

Port 2154 is assigned by IANA to stdptc (Standard Protocol).

2154

How stdptc works

Other services
client:2154stdptcresponse client:2154stdptcresponse

The client sends a request to port 2154 and the stdptc 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 2154 dangerous?

We have no specific security note for port 2154. 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 2154

ServicePortTransportDescriptionReferenceUpdated
stdptc 2154 TCP, UDP Standard Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2154, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2154'      # process listening on 2154
sudo lsof -nP -i :2154

macOS

sudo lsof -nP -i :2154

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2154 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2154
netstat -ano | findstr :2154

From another machine

nmap -p 2154 -sV <host>
sudo nmap -sU -p 2154 <host>
nc -zv <host> 2154

Block it in the firewall

sudo ufw deny 2154/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2154" -Direction Inbound -LocalPort 2154 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2154 used for?

Port 2154 is assigned by IANA to stdptc (Standard Protocol).

Is port 2154 TCP or UDP?

Port 2154 is registered for TCP and UDP.

Is it safe to open port 2154?

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 2154 is open?

On Linux run "ss -ltnup 'sport = :2154'", on macOS "lsof -nP -i :2154", and on Windows "netstat -ano | findstr :2154" to see the local process. From another machine, "nmap -p 2154 <host>" shows whether it is reachable.

05 Related
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