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// Other services

Port 6706: ForCES LP (Low priority) channel

Port 6706 is assigned by IANA to frc-lp (ForCES LP (Low priority) channel).

6706

How frc-lp works

Other services
client:6706frc-lpresponse client:6706frc-lpresponse

The client sends a request to port 6706 and the frc-lp service answers.

Transport
SCTP
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 6706 dangerous?

We have no specific security note for port 6706. 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 6706

ServicePortTransportDescriptionReferenceUpdated
frc-lp 6706 SCTP ForCES LP (Low priority) channel RFC 5811 -
-6706-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 6706, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6706'      # process listening on 6706
sudo lsof -nP -i :6706

macOS

sudo lsof -nP -i :6706

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6706 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6706
netstat -ano | findstr :6706

From another machine

nmap -p 6706 -sV <host>
nc -zv <host> 6706

Block it in the firewall

sudo ufw deny 6706/sctp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6706" -Direction Inbound -LocalPort 6706 -Protocol SCTP -Action Block  # Windows
04 FAQ
What is port 6706 used for?

Port 6706 is assigned by IANA to frc-lp (ForCES LP (Low priority) channel).

Is port 6706 TCP or UDP?

Port 6706 is registered for SCTP.

Is it safe to open port 6706?

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 6706 is open?

On Linux run "ss -ltnup 'sport = :6706'", on macOS "lsof -nP -i :6706", and on Windows "netstat -ano | findstr :6706" to see the local process. From another machine, "nmap -p 6706 <host>" shows whether it is reachable.

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