CyberHunter
Local dataset, no network
// Other services

Port 2747:

Port 2747 is assigned by IANA to fjippol-swrly ().

2747

How fjippol-swrly works

Other services
client:2747fjippol-swrlyresponse client:2747fjippol-swrlyresponse

The client sends a request to port 2747 and the fjippol-swrly 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 2747 dangerous?

We have no specific security note for port 2747. 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 2747

ServicePortTransportDescriptionReferenceUpdated
fjippol-swrly 2747 TCP, UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2747, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2747'      # process listening on 2747
sudo lsof -nP -i :2747

macOS

sudo lsof -nP -i :2747

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2747 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2747
netstat -ano | findstr :2747

From another machine

nmap -p 2747 -sV <host>
sudo nmap -sU -p 2747 <host>
nc -zv <host> 2747

Block it in the firewall

sudo ufw deny 2747/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2747" -Direction Inbound -LocalPort 2747 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2747 used for?

Port 2747 is assigned by IANA to fjippol-swrly ().

Is port 2747 TCP or UDP?

Port 2747 is registered for TCP and UDP.

Is it safe to open port 2747?

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 2747 is open?

On Linux run "ss -ltnup 'sport = :2747'", on macOS "lsof -nP -i :2747", and on Windows "netstat -ano | findstr :2747" to see the local process. From another machine, "nmap -p 2747 <host>" shows whether it is reachable.

05 Related
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