map $http_user_agent $badagent {
default 0;
~*SemrushBot 1;
~*DotBot 1;
~*AhrefsBot 1;
~*DataForSeoBot 1;
~*YandexBot 1;
~*LiveLapBot 1;
~*PetalBot 1;
~*Koj\sBot 1;
~*FeedlyBot 1;
}