# grep 'YandexBot' /var/log/apache2/acces*log /var/log/apache2/access*log.1 | sed 's/:/ /g' | awk '{print $2}' | sort -n | uniq | awk '{print "IN REJECT -source " $1 " -p tcp -log notice # YandexBot "}' 
IN REJECT -source 5.255.231.165 -p tcp -log notice # YandexBot 
IN REJECT -source 5.255.231.22 -p tcp -log notice # YandexBot 
IN REJECT -source 87.250.224.251 -p tcp -log notice # YandexBot 
IN REJECT -source 95.108.213.233 -p tcp -log notice # YandexBot