Port 8443 — HTTPS Alt

TCP · Port 8443/TCP is used for HTTPS alternative services, allowing servers to offer an alternative protocol when the primary one (typically HTTP) is not available or secure. This port plays a crucial role in ensuring the integrity and confidentiality of communication between clients and servers.

Port Number: 8443
Service Name: HTTPS Alt
Protocol: TCP
Common Software: Tomcat, Cisco ASA

Security Notes

Review IANA registry for port 8443 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 8443 used for?

Port 8443 is used for HTTPS Alt. Port 8443/TCP is used for HTTPS alternative services, allowing servers to offer an alternative protocol when the primary one (typically HTTP) is not available or secure. This port plays a crucial role in ensuring the integrity and confidentiality of communication between clients and servers. Common software: Tomcat, Cisco ASA.

Is port 8443 dangerous to leave open?

Review IANA registry for port 8443 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 8443 is open?

Use nmap: nmap -p 8443 <target> or check locally: ss -tlnp | rg 8443