CyberHunter
Local dataset, no network
// Other services

Port 4547: Lanner License Manager

Port 4547 is assigned by IANA to lanner-lm (Lanner License Manager).

4547

How lanner-lm works

Other services
client:4547lanner-lmresponse client:4547lanner-lmresponse

The client sends a request to port 4547 and the lanner-lm 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 4547 dangerous?

We have no specific security note for port 4547. 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 4547

ServicePortTransportDescriptionReferenceUpdated
lanner-lm 4547 TCP, UDP Lanner License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4547, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4547'      # process listening on 4547
sudo lsof -nP -i :4547

macOS

sudo lsof -nP -i :4547

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4547 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4547
netstat -ano | findstr :4547

From another machine

nmap -p 4547 -sV <host>
sudo nmap -sU -p 4547 <host>
nc -zv <host> 4547

Block it in the firewall

sudo ufw deny 4547/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4547" -Direction Inbound -LocalPort 4547 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4547 used for?

Port 4547 is assigned by IANA to lanner-lm (Lanner License Manager).

Is port 4547 TCP or UDP?

Port 4547 is registered for TCP and UDP.

Is it safe to open port 4547?

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 4547 is open?

On Linux run "ss -ltnup 'sport = :4547'", on macOS "lsof -nP -i :4547", and on Windows "netstat -ano | findstr :4547" to see the local process. From another machine, "nmap -p 4547 <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

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