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// Web

Port 5584: BeInSync-Web

Port 5584 is assigned by IANA to bis-web (BeInSync-Web).

5584

How bis-web works

Web
browser:5584bis-web browser:5584bis-web

A browser sends an HTTP request to port 5584 and the bis-web server sends the page back.

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
Web
01 Security

Is port 5584 dangerous?

We have no specific security note for port 5584. Its risk depends on the program actually listening on it. General advice for web services:

  • Serve it over HTTPS only and check the HTTP security headers.
  • Keep admin consoles and development servers off the Internet.
  • Patch the application server and remove default credentials and sample apps.
02 Registry

IANA registry entries for port 5584

ServicePortTransportDescriptionReferenceUpdated
bis-web 5584 TCP, UDP BeInSync-Web - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 5584, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5584'      # process listening on 5584
sudo lsof -nP -i :5584

macOS

sudo lsof -nP -i :5584

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5584 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5584
netstat -ano | findstr :5584

From another machine

nmap -p 5584 -sV <host>
sudo nmap -sU -p 5584 <host>
nc -zv <host> 5584

Block it in the firewall

sudo ufw deny 5584/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5584" -Direction Inbound -LocalPort 5584 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5584 used for?

Port 5584 is assigned by IANA to bis-web (BeInSync-Web).

Is port 5584 TCP or UDP?

Port 5584 is registered for TCP and UDP.

Is it safe to open port 5584?

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. Serve it over HTTPS only and check the HTTP security headers.

How do I check if port 5584 is open?

On Linux run "ss -ltnup 'sport = :5584'", on macOS "lsof -nP -i :5584", and on Windows "netstat -ano | findstr :5584" to see the local process. From another machine, "nmap -p 5584 <host>" shows whether it is reachable.

05 Related
:443 HTTPS tcp · udp · sctp · low risk :80 HTTP tcp · udp · sctp · moderate risk :8080 HTTP alternate tcp · udp · high risk :8443 HTTPS alternate tcp · udp · moderate risk :3000 Dev servers / Grafana tcp · udp · moderate risk :5000 Flask / Docker registry / UPnP tcp · udp · moderate risk :8000 HTTP alternate (dev) tcp · udp · moderate risk :8888 Jupyter / HTTP alternate tcp · udp · high risk

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