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// Web

Port 9023: Secure Web Access - 1

Port 9023 is assigned by IANA to swa-1 (Secure Web Access - 1).

9023

How swa-1 works

Web
browser:9023swa-1 browser:9023swa-1

A browser sends an HTTP request to port 9023 and the swa-1 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 9023 dangerous?

We have no specific security note for port 9023. 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 9023

ServicePortTransportDescriptionReferenceUpdated
swa-1 9023 TCP, UDP Secure Web Access - 1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9023, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9023'      # process listening on 9023
sudo lsof -nP -i :9023

macOS

sudo lsof -nP -i :9023

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9023 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9023
netstat -ano | findstr :9023

From another machine

nmap -p 9023 -sV <host>
sudo nmap -sU -p 9023 <host>
nc -zv <host> 9023

Block it in the firewall

sudo ufw deny 9023/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9023" -Direction Inbound -LocalPort 9023 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9023 used for?

Port 9023 is assigned by IANA to swa-1 (Secure Web Access - 1).

Is port 9023 TCP or UDP?

Port 9023 is registered for TCP and UDP.

Is it safe to open port 9023?

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 9023 is open?

On Linux run "ss -ltnup 'sport = :9023'", on macOS "lsof -nP -i :9023", and on Windows "netstat -ano | findstr :9023" to see the local process. From another machine, "nmap -p 9023 <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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