modsecurity reverse dns whitelist googlebot
vi /etc/apache2/conf.d/modsec/modsec2.user.conf
#At the end add
HostnameLookups On
SecRule REMOTE_HOST "@endsWith .googlebot.com" "allow,log,id:5000001,msg:'googlebot'"
SecRule REMOTE_HOST "@endsWith .google.com" "allow,log,id:5000002,msg:'googlebot'"
SecRule REMOTE_HOST "@endsWith .search.msn.com" "allow,log,id:5000003,msg:'msn bot'"
SecRule REMOTE_HOST "@endsWith .crawl.yahoo.net" "allow,log,id:5000004,msg:'yahoo bot'"
SecRule REMOTE_HOST "@endsWith .yandex.ru" "allow,log,id:5000005,msg:'yandex bot'"
SecRule REMOTE_HOST "@endsWith .yandex.net" "allow,log,id:5000006,msg:'yandex bot'"
SecRule REMOTE_HOST "@endsWith .yandex.com" "allow,log,id:5000007,msg:'yandex bot'"
SecRule REMOTE_HOST "@endsWith .crawl.baidu.com" "allow,log,id:5000008,msg:'baidu bot'"
SecRule REMOTE_HOST "@endsWith .crawl.baidu.jp" "allow,log,id:5000009,msg:'baidu bot'"