

I’m not sure how that applies here.
I am talking about enterprises being able to leverage their current infrastructure to manage their users in Mastodon from a central location, Like AD. Rather than have to manage local accounts.
I am not talking about activitypub in anyway.
Since it sounds like this is your home router since you mentioned you use Comcast. If you are testing the site from within your network using your external ip then you are possibly running into a loop back block. Comcast does not allow traffic that originates from within your network back into your network.
Try the ip/site from a Hotspot and that might work.