UA: Mozilla/5.0 (compatible; YandexMetrika/2.0; +http://yandex.com/bots)
Protocol: HTTP/1.1
Robots.txt: No
Host: digitalocean.com
46.185.128.0 - 146.185.191.255
146.185.128.0/18
Yandex bots have always been difficult to validate (in fact they advise against it) because their agents change range so often. The agent mentioned above was blocked because it is not coming from a Yandex range and likely an impostor.