CyberHunter
Local dataset, no network
// Other services

Port 8913: Dragonfly System Service

Port 8913 is assigned by IANA to dragonfly (Dragonfly System Service).

8913

How dragonfly works

Other services
client:8913dragonflyresponse client:8913dragonflyresponse

The client sends a request to port 8913 and the dragonfly 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 8913 dangerous?

We have no specific security note for port 8913. 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 8913

ServicePortTransportDescriptionReferenceUpdated
dragonfly 8913 TCP, UDP Dragonfly System Service - 2005-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 8913, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8913'      # process listening on 8913
sudo lsof -nP -i :8913

macOS

sudo lsof -nP -i :8913

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8913 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8913
netstat -ano | findstr :8913

From another machine

nmap -p 8913 -sV <host>
sudo nmap -sU -p 8913 <host>
nc -zv <host> 8913

Block it in the firewall

sudo ufw deny 8913/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8913" -Direction Inbound -LocalPort 8913 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8913 used for?

Port 8913 is assigned by IANA to dragonfly (Dragonfly System Service).

Is port 8913 TCP or UDP?

Port 8913 is registered for TCP and UDP.

Is it safe to open port 8913?

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 8913 is open?

On Linux run "ss -ltnup 'sport = :8913'", on macOS "lsof -nP -i :8913", and on Windows "netstat -ano | findstr :8913" to see the local process. From another machine, "nmap -p 8913 <host>" shows whether it is reachable.

05 Related
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