# WHATPORT(8443)

## NAME

port 8443 — HTTPS alternate — The TLS counterpart to 8080: HTTPS on an unprivileged port.

Protocol: TCP  
IANA: pcsync-https

## DESCRIPTION

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.

## EXPOSURE

**Expose with care.** TLS on the wire is not authentication — check the certificate and what the service behind it lets an anonymous caller do.

## CHECK

```sh
openssl s_client -connect 127.0.0.1:8443 -servername localhost </dev/null 2>/dev/null | openssl x509 -noout -subject -issuer -dates
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry — 8443](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=8443) (iana.org)
- docs — [Apache Tomcat 11 — SSL/TLS Configuration HOW-TO (connector on 8443)](https://tomcat.apache.org/tomcat-11.0-doc/ssl-howto.html) (tomcat.apache.org)

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HTML: <https://whatport.net/8443/> · JSON: <https://whatport.net/8443.json> · full dataset: <https://whatport.net/ports.json>