What is User-Agent: Google-Certificates-Bridge

Recently I noticed in my Firewall logs I am getting hit by the IP address 66.102.7.72 identifying itself as User-Agent: Google-Certificates-Bridge. My firewall automatically blocked it as it tried multiple times to access my site within seconds of each other. Does anyone know what this is and if I should unblock it?

Thanks.

That IP address does not belong to Cloudflare. I don’t see how this relates to Cloudflare.

Hi sdayman, My domain uses Cloudflare so I thought I’d ask here since I got no answer in the Blogger Help Forum.