So I'm still poking around my network trying to understand all the ports and how they're interacting. Eventually I'll get some reverse proxies set up, but I want to make sure I clearly understand what is going on at the base level before moving on.
I had DSM set on the default 5000/5001 ports...
Not a resource per se, but a pointer to Synology’s knowledge base page that shows the default ports used by the services. I find that I refer to it frequently. Might be useful (and easier) to pin it here for all of us :)
Network ports used by Synology services.