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// Other services

Port 2555: Compaq WCP

Port 2555 is assigned by IANA to compaq-wcp (Compaq WCP).

2555

How compaq-wcp works

Other services
client:2555compaq-wcpresponse client:2555compaq-wcpresponse

The client sends a request to port 2555 and the compaq-wcp 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 2555 dangerous?

We have no specific security note for port 2555. 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 2555

ServicePortTransportDescriptionReferenceUpdated
compaq-wcp 2555 TCP, UDP Compaq WCP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2555, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2555'      # process listening on 2555
sudo lsof -nP -i :2555

macOS

sudo lsof -nP -i :2555

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2555 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2555
netstat -ano | findstr :2555

From another machine

nmap -p 2555 -sV <host>
sudo nmap -sU -p 2555 <host>
nc -zv <host> 2555

Block it in the firewall

sudo ufw deny 2555/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2555" -Direction Inbound -LocalPort 2555 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2555 used for?

Port 2555 is assigned by IANA to compaq-wcp (Compaq WCP).

Is port 2555 TCP or UDP?

Port 2555 is registered for TCP and UDP.

Is it safe to open port 2555?

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 2555 is open?

On Linux run "ss -ltnup 'sport = :2555'", on macOS "lsof -nP -i :2555", and on Windows "netstat -ano | findstr :2555" to see the local process. From another machine, "nmap -p 2555 <host>" shows whether it is reachable.

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