How to protect a server's IP from being exposed?

[supermathie (Michael Brown)]

We don’t have a complete end-to-end guide on doing this, but here are other relevant topics:

Hiding the origin on cloudflare

While researching Cloudflare and best practices to use to protect my server I ran into an article by Cloudflare about protecting the origin IP (the IP where the website is actually being ran from) because you would be able to circumvent all of Cloudflares ddos protection if you had it. What interested me was specifically this section: Never initiate an outbound connection based on user action If the attacker can get your web server to connect to an arbitrary address, they will reveal your …

Discourse Link previews through a proxy server?

I keep my forum’s server behind cloud flare due to a large amount of attacks against the site. The link previews and emails can leak the server’s backend IP Address. The email issue was resolved by setting up a SMTP relay that strips headers (if the user pulls email headers to get the IP, they get the relay and not the forum’s IP). Is there a way to make the link previews go through a proxy server?