Attempts to begin hosting an HTTPS server on the given port. The port is a number from 1 to 65535, but 443 is the default for HTTPS.

HTTPS is the secure variant of the protocol that websites use, e.g. https://google.com.


HTTPS can only be used by buying a SSL certificate, and setting the HTTPS server to it with the HTTPS server > Load certificate from system action.

For testing, you can self-generate a SSL certificate on your own machine, but since they are not from a globally-reliable certificate source, web browsers will consider the website untrustworthy.


It is possible to connect to the server on the machine it's on, using https://localhost:port/ in a browser. Likewise, you can use an IP, including using a local IP, to access it over LAN.


Refer to the Hosting a server topic to expose your server to outside your LAN.


Be aware Lacewing Webserver has its source code lost, and is a security risk, as it has plenty of holes that can be exploited.


Running a Host action twice on the same port will result in a repeating error:

Socket error – Error accepting – The I/O operation has been aborted because of either a thread exit or an application request. (995)