I'm trying to restrict the access to the App Engine app which also has the custom domain configured for it. With no firewall restrictions enabled, I can access it both through the custom and the default .appspot.com domain, both using http and https. If I add the Allow rule with my external IP and set the default rule to Deny, I end up being unable to access the app using the custom domain and https (getting 403 code), but http with custom domain and http/https with appspot.com domain still work. Got no clue where to look at, has anyone faced this?
Thank you!