Is it possible to use a [legacy] Software Update Server (or the open source Reposado) with Mojave? There are CatalogURLs for the software update feeds for the Mojave Beta, but the 'softwareupdate' command line tool and GUI equivalent seem to have problems with both "http" and "https" connections to an internal SUS.
HTTP example:
$ softwareupdate -l
[snip]
Can't establish a secure connection to the Apple Software Update server.HTTPS example:
$ softwareupdate -l
[snip]
An SSL error has occurred and a secure connection to the server cannot be made.Other testing:
The "curl" command line tool can successfully download the software update catalog from the SUS via HTTP. This is commonly done to test the open source Reposado tool's configuration.