Earlier tonight, myself & a few others on the #osx-server channel in the macadmins.org Slack started to receive alerts from our macOS Servers running a Caching Service.
Sadly, it was not just the harmless “Caching service unavailable” alerts that you see at times.
Recently we found that the JSS was setting our clients Software Update Catalog URL to http://:/index.sucatalog.
Well, as detailed previously, we moved from using Software Update servers to Caching.
The move to caching servers actually meant I shot myself in the foot some & caused my own issue. JAMF Support got me things sorted & below is how & my guess work as to what was happening.