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// Other services

Port 10055: Quantapoint FLEXlm Licensing Service

Port 10055 is assigned by IANA to qptlmd (Quantapoint FLEXlm Licensing Service).

10055

How qptlmd works

Other services
client:10055qptlmdresponse client:10055qptlmdresponse

The client sends a request to port 10055 and the qptlmd 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 10055 dangerous?

We have no specific security note for port 10055. 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 10055

ServicePortTransportDescriptionReferenceUpdated
qptlmd 10055 TCP Quantapoint FLEXlm Licensing Service - 2010-07-01
-10055-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 10055, and is it reachable?

Linux

sudo ss -ltnup 'sport = :10055'      # process listening on 10055
sudo lsof -nP -i :10055

macOS

sudo lsof -nP -i :10055

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 10055 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 10055
netstat -ano | findstr :10055

From another machine

nmap -p 10055 -sV <host>
nc -zv <host> 10055

Block it in the firewall

sudo ufw deny 10055/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 10055" -Direction Inbound -LocalPort 10055 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 10055 used for?

Port 10055 is assigned by IANA to qptlmd (Quantapoint FLEXlm Licensing Service).

Is port 10055 TCP or UDP?

Port 10055 is registered for TCP.

Is it safe to open port 10055?

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 10055 is open?

On Linux run "ss -ltnup 'sport = :10055'", on macOS "lsof -nP -i :10055", and on Windows "netstat -ano | findstr :10055" to see the local process. From another machine, "nmap -p 10055 <host>" shows whether it is reachable.

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