Any issues when switching Cloudflare on?

We have a Django API and Next/ReactJS application running on GCP. We’re looking to use Cloudflare for CDN caching and a range of custom firewall things like bruteforce protection.

Aside from waiting for the DNS to switch, have people noticed any gotchas when CF went on top of their web application?

Thanks

If you’re using an API, keep in mind logged IPs will start showing up as Cloudflare IPs which could mess up ratelimiting.

Ah so i wont be able to see user IPs? They’ll be behind Cloudflare? Cloudflare will be wrapped around the frontend DNS though, not the API. Does this solve the issue?

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