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// Other services

Port 7551: ControlONE Console signaling

Port 7551 is assigned by IANA to controlone-con (ControlONE Console signaling).

7551

How controlone-con works

Other services
client:7551controlone-conresponse client:7551controlone-conresponse

The client sends a request to port 7551 and the controlone-con 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 7551 dangerous?

We have no specific security note for port 7551. 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 7551

ServicePortTransportDescriptionReferenceUpdated
controlone-con 7551 TCP ControlONE Console signaling - 2017-06-13
-7551-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 7551, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7551'      # process listening on 7551
sudo lsof -nP -i :7551

macOS

sudo lsof -nP -i :7551

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7551 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7551
netstat -ano | findstr :7551

From another machine

nmap -p 7551 -sV <host>
nc -zv <host> 7551

Block it in the firewall

sudo ufw deny 7551/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7551" -Direction Inbound -LocalPort 7551 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7551 used for?

Port 7551 is assigned by IANA to controlone-con (ControlONE Console signaling).

Is port 7551 TCP or UDP?

Port 7551 is registered for TCP.

Is it safe to open port 7551?

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 7551 is open?

On Linux run "ss -ltnup 'sport = :7551'", on macOS "lsof -nP -i :7551", and on Windows "netstat -ano | findstr :7551" to see the local process. From another machine, "nmap -p 7551 <host>" shows whether it is reachable.

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