Where is my show hosted?
Apple Podcasts is a directory of user-submitted shows available for download from third parties’ servers. You must host the RSS feed as well as your show's content and media files on your own web server or use a hosting provider.
See Apple Podcasts Hosting Partners who can help you.
Do I need to use HTTPS?
Apple strongly encourages you to use a hosting server that supports SSL (Secure Sockets Layer). This security technology will allow you to generate an HTTPS RSS feed URL. For example, https://applehosted.podcasts.apple.com/hikingtreks.xml.
In the future, HTTPS RSS feeds will be required for submission in Podcasts Connect and to access Podcast Analytics.
Most major hosting services offer secure RSS feeds. They can also help you migrate your feed if the one you're currently using does not support SSL.