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// Other services

Port 2706: NCD Mirroring

Port 2706 is assigned by IANA to ncdmirroring (NCD Mirroring).

2706

How ncdmirroring works

Other services
client:2706ncdmirroringresponse client:2706ncdmirroringresponse

The client sends a request to port 2706 and the ncdmirroring 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 2706 dangerous?

We have no specific security note for port 2706. 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 2706

ServicePortTransportDescriptionReferenceUpdated
ncdmirroring 2706 TCP, UDP NCD Mirroring - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2706, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2706'      # process listening on 2706
sudo lsof -nP -i :2706

macOS

sudo lsof -nP -i :2706

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2706 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2706
netstat -ano | findstr :2706

From another machine

nmap -p 2706 -sV <host>
sudo nmap -sU -p 2706 <host>
nc -zv <host> 2706

Block it in the firewall

sudo ufw deny 2706/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2706" -Direction Inbound -LocalPort 2706 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2706 used for?

Port 2706 is assigned by IANA to ncdmirroring (NCD Mirroring).

Is port 2706 TCP or UDP?

Port 2706 is registered for TCP and UDP.

Is it safe to open port 2706?

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 2706 is open?

On Linux run "ss -ltnup 'sport = :2706'", on macOS "lsof -nP -i :2706", and on Windows "netstat -ano | findstr :2706" to see the local process. From another machine, "nmap -p 2706 <host>" shows whether it is reachable.

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