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// Other services

Port 2126: PktCable-COPS

Port 2126 is assigned by IANA to pktcable-cops (PktCable-COPS).

2126

How pktcable-cops works

Other services
client:2126pktcable-copsresponse client:2126pktcable-copsresponse

The client sends a request to port 2126 and the pktcable-cops 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 2126 dangerous?

We have no specific security note for port 2126. 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 2126

ServicePortTransportDescriptionReferenceUpdated
pktcable-cops 2126 TCP, UDP PktCable-COPS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2126, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2126'      # process listening on 2126
sudo lsof -nP -i :2126

macOS

sudo lsof -nP -i :2126

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2126 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2126
netstat -ano | findstr :2126

From another machine

nmap -p 2126 -sV <host>
sudo nmap -sU -p 2126 <host>
nc -zv <host> 2126

Block it in the firewall

sudo ufw deny 2126/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2126" -Direction Inbound -LocalPort 2126 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2126 used for?

Port 2126 is assigned by IANA to pktcable-cops (PktCable-COPS).

Is port 2126 TCP or UDP?

Port 2126 is registered for TCP and UDP.

Is it safe to open port 2126?

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 2126 is open?

On Linux run "ss -ltnup 'sport = :2126'", on macOS "lsof -nP -i :2126", and on Windows "netstat -ano | findstr :2126" to see the local process. From another machine, "nmap -p 2126 <host>" shows whether it is reachable.

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