The TLS counterpart to 8080: HTTPS on an unprivileged port.
IANA has 8443 registered as pcsync-https, but in practice it is the conventional alternate HTTPS port. Tomcat's shipped SSL connector example uses 8443, and appliance web UIs, Kubernetes-adjacent services and admin consoles commonly serve TLS there. A listener on 8443 speaks TLS, so a plain HTTP request to it will fail.
Expose with care
TLS on the wire is not authentication — check the certificate and what the service behind it lets an anonymous caller do.
$ openssl s_client -connect 127.0.0.1:8443 -servername localhost </dev/null 2>/dev/null | openssl x509 -noout -subject -issuer -datesSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.