I tried re-booting the routers and the Rock but no joy.
Regarding changing the DNS, I presume that would be on the Rock settings. I looked on the Rock web interface and the DNS seems fixed. My Rock is on a fixed IP from the router.
Both my Roon Remote on the mac mini and the iPad updated OK, but not the core.
In addition to exploring your DNS settings, it would be good to get a more clear picture of your network setup, and how your server is connected to your network:
Networking Gear & Setup Details
Your network gear (model of routers/switches) and if on WiFi/Ethernet
Thanks for responding. I was waiting for an IT friend to visit this coming weekend to try to implement a fix (for the reasons below).
I live in a rural area so internet over copper cable using a standard Plusnet (Internet provider) router directly connects to a Draytek wireless router by cable from which the rest of the system is connected. Rock is connected to the Draytek by ethernet cable as is the M1 mini which runs Roon Remote. The Draytek sets static IP’s for all the Hifi components (Rock, Rossini, NAS and M1 mini). iPad runs Roon Remote and connects to the Draytek via wireless.
Rossini DAC is connected to the Draytek using ethernet using two Cisco 2960 routers with SFP’s and optical jump.
Everything works as nature intended except Rock can’t update. The M1 mini and iPad both updated without issues.
I tried to access the Plusnet router using the IP address 192.168.1.254 to check the DNS, but, for whatever reason, the M1 reports server not responding.
Thanks for your help but with the help of a friend we got it sorted. Changed the Rock settings to static and made the gateway the same as the IP address.