84.122.75.## - - [02/Apr/2015:14:28:36 -0700] "GET /robots.txt HTTP/1.0" 200 5103 "-" "FOSSMOVEMENT"
A.K.A. free-software movement, could be almost anything. In this case it looks like a bot crawling my pages (now blocked.)
Coming from ono.com (CableEuropa) an ISP in Spain.
84.120.0.0 - 84.123.255.255