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// Web

Port 5443: Pearson HTTPS

Port 5443 is assigned by IANA to spss (Pearson HTTPS).

5443

How spss works

Web
browser:5443spss browser:5443spss

A browser sends an HTTP request to port 5443 and the spss 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 5443 dangerous?

We have no specific security note for port 5443. 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 5443

ServicePortTransportDescriptionReferenceUpdated
spss 5443 TCP, UDP Pearson HTTPS - 2008-01-17

// source: IANA service name and port number registry

03 Check it

Which program uses port 5443, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5443'      # process listening on 5443
sudo lsof -nP -i :5443

macOS

sudo lsof -nP -i :5443

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5443 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5443
netstat -ano | findstr :5443

From another machine

nmap -p 5443 -sV <host>
sudo nmap -sU -p 5443 <host>
nc -zv <host> 5443

Block it in the firewall

sudo ufw deny 5443/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5443" -Direction Inbound -LocalPort 5443 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5443 used for?

Port 5443 is assigned by IANA to spss (Pearson HTTPS).

Is port 5443 TCP or UDP?

Port 5443 is registered for TCP and UDP.

Is it safe to open port 5443?

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 5443 is open?

On Linux run "ss -ltnup 'sport = :5443'", on macOS "lsof -nP -i :5443", and on Windows "netstat -ano | findstr :5443" to see the local process. From another machine, "nmap -p 5443 <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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