Port 443 is used by HTTP Secure (TLS) (HTTPS). Encrypted web traffic. All modern websites should use HTTPS on port 443, secured by TLS. The padlock icon in your browser confirms this connection.
What Does an Open Port 443 Mean?
A web server is running with SSL/TLS encryption. This is the standard for all public websites. If you run a website, port 443 should be open.
This port is expected to be open on servers that run this service.
Security Risk Level
Low Risk
How to Check if Port 443 Is Open
Use the ExamineIP Port Scanner to check if port 443 is open on any IP address from the public internet. Enter the target IP and select the relevant port preset.
How to Close Port 443
- Stop the service using port 443 if you no longer need it
- Add a firewall rule blocking inbound connections on port 443
- Check your router for port forwarding rules that expose this port
- Run
netstat -ano | findstr :443(Windows) to see which process is using it
Related Ports
HTTPS is related to: {implode(‘, ‘, Array)}
Protect Your Open Ports
If you need services like remote access, use a VPN to create a private encrypted tunnel instead of exposing ports directly to the internet. A VPN also hides your real IP address so port scanners cannot identify your device. Try PureVPN or IPVanish.