While it is possible to create a masked forward that would display another website's content under your domain, this would require custom coding that is not supported. In addition to this, it is recommended that you do not use these methods to display content from an external server on your domain for the following reasons:
- No Search Engine Optimization: While viewers may see your domain when they visit the site, search engines will still identify the content as being served by the original domain. This will prevent your links from being indexed or gaining search engine ranking. In addition to this, the masked forward will not provide any tags to serve data for your site, preventing search engines from providing helpful information from your site.
- Poor Social Media Sharing: When you share links from your page via social media pages, they extract images and descriptions from the metadata of your page, which they will not be able to retrieve through a masked forward.
- Site Links: Links from the page will not work correctly through a masked forward, causing unexpected browser issues, failing to display URL changes, and even continuing to display your domain as viewers click links to pages that are not part of your site. In addition to this, these links can compromise the security of your links, and services like PayPal will potentially block transactions from your page.
If you are developing your page with a third-party service, rather than using masked forwarding to display it, the service will likely have a more effective solution for displaying your content.