My website is currently getting hit with spamming bots (Example: 66.249.73.*) that are causing high CPU usage. Is it common for Google/Bing to crawl a website 10/sec?
I have done reverse look ups on the IPs and they appear to be valid crawlers using https://support.google.com/webmasters/answer/80553?hl=en.
Because I have blocked some IP's, Google/Bing Search Console are reporting errors and hurting my index.
This has been happening this month (April). Is this a referral attack? Is it possible someone is spoofing the IPs? Is there something I can do to limit the amount of crawls?
I am currently in the process of creating a server-side rendering for crawlers, but this is a tedious task for something that just started happening randomly.