Access to the site for Googlebot bypassing the anti-ddos filter - how to implement it?

Question

Google

The site https://arizona-rp.com has a DDoS filter similar to Cloudflare - wait 5 seconds your browser is being checked.
But there is a problem - the same filter works on both GoogleBot and media partners bot - in general, everywhere - "View as Googlebot", PageSpeed ​​Insights - sees only the antiddos window - accordingly, you can’t do any checks.
How to implement Googlebot access to the site bypassing this filter? they do not advise on ip, because the bot is constantly different and changing, you can’t list everyone and all that.
Screen:

Answer 1

reverse DNS

Answer 2

By useragent, but this is a potential hole for an attacker who plans to implement a ddos ​​attack on your resource