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// Other services

Port 6655: PC SOFT - Software factory UI/manager

Port 6655 is assigned by IANA to pcs-sf-ui-man (PC SOFT - Software factory UI/manager).

6655

How pcs-sf-ui-man works

Other services
client:6655pcs-sf-ui-manresponse client:6655pcs-sf-ui-manresponse

The client sends a request to port 6655 and the pcs-sf-ui-man service answers.

Transport
TCP
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 6655 dangerous?

We have no specific security note for port 6655. 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 6655

ServicePortTransportDescriptionReferenceUpdated
pcs-sf-ui-man 6655 TCP PC SOFT - Software factory UI/manager - 2010-11-30
-6655-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 6655, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6655'      # process listening on 6655
sudo lsof -nP -i :6655

macOS

sudo lsof -nP -i :6655

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6655 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6655
netstat -ano | findstr :6655

From another machine

nmap -p 6655 -sV <host>
nc -zv <host> 6655

Block it in the firewall

sudo ufw deny 6655/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6655" -Direction Inbound -LocalPort 6655 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6655 used for?

Port 6655 is assigned by IANA to pcs-sf-ui-man (PC SOFT - Software factory UI/manager).

Is port 6655 TCP or UDP?

Port 6655 is registered for TCP.

Is it safe to open port 6655?

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 6655 is open?

On Linux run "ss -ltnup 'sport = :6655'", on macOS "lsof -nP -i :6655", and on Windows "netstat -ano | findstr :6655" to see the local process. From another machine, "nmap -p 6655 <host>" shows whether it is reachable.

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