the Collabora server works just fine. works great with the primary NC instance also.
secondary NC instance works great with it’s own built in CODE server. i can point secondary NC instance to Collabora server in settings and it sees it just fine (with or without port or SSL check, everything has working https).
but the secondary instance won’t “use” the Collabora instance, it just spins then fails when i try to create/load a document.
btw to clarify, these are all bare metal installs, no docker. Ubuntu 22.04.
your link immediately solved the issue with no reading even necessary!
once i saw the graphic that showed the traffic going back and forth from the collabora/NC servers, i instantly realized i needed to add the collabora IP address to the allow list for WOPI requests on my NC installation.