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

Port 7546: Cisco Fabric service

Port 7546 is assigned by IANA to cfs (Cisco Fabric service).

7546

How cfs works

Other services
client:7546cfsresponse client:7546cfsresponse

The client sends a request to port 7546 and the cfs 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 7546 dangerous?

We have no specific security note for port 7546. 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 7546

ServicePortTransportDescriptionReferenceUpdated
cfs 7546 TCP, UDP Cisco Fabric service - 2005-09

// source: IANA service name and port number registry

03 Check it

Which program uses port 7546, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7546'      # process listening on 7546
sudo lsof -nP -i :7546

macOS

sudo lsof -nP -i :7546

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7546 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7546
netstat -ano | findstr :7546

From another machine

nmap -p 7546 -sV <host>
sudo nmap -sU -p 7546 <host>
nc -zv <host> 7546

Block it in the firewall

sudo ufw deny 7546/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7546" -Direction Inbound -LocalPort 7546 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7546 used for?

Port 7546 is assigned by IANA to cfs (Cisco Fabric service).

Is port 7546 TCP or UDP?

Port 7546 is registered for TCP and UDP.

Is it safe to open port 7546?

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 7546 is open?

On Linux run "ss -ltnup 'sport = :7546'", on macOS "lsof -nP -i :7546", and on Windows "netstat -ano | findstr :7546" to see the local process. From another machine, "nmap -p 7546 <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