CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 2567: Cisco Line Protocol

Port 2567 is assigned by IANA to clp (Cisco Line Protocol).

2567

How clp works

Other services
client:2567clpresponse client:2567clpresponse

The client sends a request to port 2567 and the clp 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 2567 dangerous?

We have no specific security note for port 2567. 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 2567

ServicePortTransportDescriptionReferenceUpdated
clp 2567 TCP, UDP Cisco Line Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2567, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2567'      # process listening on 2567
sudo lsof -nP -i :2567

macOS

sudo lsof -nP -i :2567

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2567 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2567
netstat -ano | findstr :2567

From another machine

nmap -p 2567 -sV <host>
sudo nmap -sU -p 2567 <host>
nc -zv <host> 2567

Block it in the firewall

sudo ufw deny 2567/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2567" -Direction Inbound -LocalPort 2567 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2567 used for?

Port 2567 is assigned by IANA to clp (Cisco Line Protocol).

Is port 2567 TCP or UDP?

Port 2567 is registered for TCP and UDP.

Is it safe to open port 2567?

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 2567 is open?

On Linux run "ss -ltnup 'sport = :2567'", on macOS "lsof -nP -i :2567", and on Windows "netstat -ano | findstr :2567" to see the local process. From another machine, "nmap -p 2567 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

Latest vulnerability news

All news