CyberHunter
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// Other services

Port 6547: APC 6547

Port 6547 is assigned by IANA to apc-6547 (APC 6547).

6547

How apc-6547 works

Other services
client:6547apc-6547response client:6547apc-6547response

The client sends a request to port 6547 and the apc-6547 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 6547 dangerous?

We have no specific security note for port 6547. 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 6547

ServicePortTransportDescriptionReferenceUpdated
apc-6547 6547 TCP, UDP APC 6547 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6547, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6547'      # process listening on 6547
sudo lsof -nP -i :6547

macOS

sudo lsof -nP -i :6547

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6547 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6547
netstat -ano | findstr :6547

From another machine

nmap -p 6547 -sV <host>
sudo nmap -sU -p 6547 <host>
nc -zv <host> 6547

Block it in the firewall

sudo ufw deny 6547/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6547" -Direction Inbound -LocalPort 6547 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6547 used for?

Port 6547 is assigned by IANA to apc-6547 (APC 6547).

Is port 6547 TCP or UDP?

Port 6547 is registered for TCP and UDP.

Is it safe to open port 6547?

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 6547 is open?

On Linux run "ss -ltnup 'sport = :6547'", on macOS "lsof -nP -i :6547", and on Windows "netstat -ano | findstr :6547" to see the local process. From another machine, "nmap -p 6547 <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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