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// Other services

Port 2827: slc ctrlrloops

Port 2827 is assigned by IANA to slc-ctrlrloops (slc ctrlrloops).

2827

How slc-ctrlrloops works

Other services
client:2827slc-ctrlrloopsresponse client:2827slc-ctrlrloopsresponse

The client sends a request to port 2827 and the slc-ctrlrloops 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 2827 dangerous?

We have no specific security note for port 2827. 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 2827

ServicePortTransportDescriptionReferenceUpdated
slc-ctrlrloops 2827 TCP, UDP slc ctrlrloops - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2827, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2827'      # process listening on 2827
sudo lsof -nP -i :2827

macOS

sudo lsof -nP -i :2827

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2827 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2827
netstat -ano | findstr :2827

From another machine

nmap -p 2827 -sV <host>
sudo nmap -sU -p 2827 <host>
nc -zv <host> 2827

Block it in the firewall

sudo ufw deny 2827/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2827" -Direction Inbound -LocalPort 2827 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2827 used for?

Port 2827 is assigned by IANA to slc-ctrlrloops (slc ctrlrloops).

Is port 2827 TCP or UDP?

Port 2827 is registered for TCP and UDP.

Is it safe to open port 2827?

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 2827 is open?

On Linux run "ss -ltnup 'sport = :2827'", on macOS "lsof -nP -i :2827", and on Windows "netstat -ano | findstr :2827" to see the local process. From another machine, "nmap -p 2827 <host>" shows whether it is reachable.

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