Getting Discourse Embed comments working in development?

I tried to re-animate an old topic on this subject without luck. I’m not able to get comment embedding working in a dev environment. I’ve tried in the vagrant environment and a bare-metal Mac OSX environment. I’m whitelisting ports and domains, and have it working fine in a production environment across domains/subdomains, but locally the job (created here) just seems to up and disappear. Can anyone confirm that this still works in a dev environment?

For some context, I’m want to enable embedding comments on a site behind basic HTTP authentication, but this is a blocker for me.

Same here did you find any way to achieve this

Also curious if there is a way to test embedding locally (on Mac), currently I am having issues with the iframe sending messages to different ports