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// Other services

Port 7547: Broadband Forum CWMP

Port 7547 is assigned by IANA to cwmp (Broadband Forum CWMP).

7547

How cwmp works

Other services
client:7547cwmpresponse client:7547cwmpresponse

The client sends a request to port 7547 and the cwmp 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 7547 dangerous?

We have no specific security note for port 7547. 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 7547

ServicePortTransportDescriptionReferenceUpdated
cwmp 7547 TCP, UDP Broadband Forum CWMP - 2019-12-13

// source: IANA service name and port number registry

03 Check it

Which program uses port 7547, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7547'      # process listening on 7547
sudo lsof -nP -i :7547

macOS

sudo lsof -nP -i :7547

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7547 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7547
netstat -ano | findstr :7547

From another machine

nmap -p 7547 -sV <host>
sudo nmap -sU -p 7547 <host>
nc -zv <host> 7547

Block it in the firewall

sudo ufw deny 7547/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7547" -Direction Inbound -LocalPort 7547 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7547 used for?

Port 7547 is assigned by IANA to cwmp (Broadband Forum CWMP).

Is port 7547 TCP or UDP?

Port 7547 is registered for TCP and UDP.

Is it safe to open port 7547?

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 7547 is open?

On Linux run "ss -ltnup 'sport = :7547'", on macOS "lsof -nP -i :7547", and on Windows "netstat -ano | findstr :7547" to see the local process. From another machine, "nmap -p 7547 <host>" shows whether it is reachable.

05 Related
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