کد:
echo ".googlebot.com" >> /etc/csf/csf.rignore
echo ".crawl.yahoo.net" >> /etc/csf/csf.rignore
echo ".search.msn.com" >> /etc/csf/csf.rignore
csf -a 64.233.160.0/19 
csf -a 66.102.0.0/20
csf -a 66.249.64.0/19
csf -a 72.14.192.0/18
csf -a 74.125.0.0/16
csf -a 216.239.32.0/19

https://evert.meulie.net/faqwd/googlebot-ip-ranges/