Varnish Live needs access Varnish Custom Statistics to fetch time series data. One way to expose Varnish Custom Statistics securely to the Internet is to have Hitch and Varnish in front of it.
The following is an example VCL that can be used to access a VCS endpoint via Varnish on a custom URL. The example VCL also contains the VCS key (
vcs-key) that is used by Varnish Custom Statistics to create the time series.