Previously, I used the free tier service, but because the SSL period was very short, I decided to use Cloudflare and then DNS to Infinityfree. I set the A and CNAME from Cloudflare to my hosting IP, so the flow was domain → Cloudflare → Infinityfree. After using Cloudflare for two days, suddenly when I accessed one of the subdomains, it displayed a 403 Forbidden error.
Since you said that “everyone using your home network is experiencing issue” then this most probably have something to do with your ISP. Maybe you should try contacting them first.
It’s also possible that free hosting blocked your IP address, in this case you have to wait for Admin.
If the admin blocks my IP, is it illegal to use Cloudflare as a bridge for SSL and additional security? Previously, I thought that Cloudflare’s IP was blocked.