Apacheの「/var/log/httpd/access_log」を確認していたら、以下のログが頻繁に発生していました。 ::1 - - [24/May/2015:15:34:37 +0900] "OPTIONS * HTTP/1.0" 200 - "-" "Apache/2.2.29 (Amazon) (internal dummy connection)" ::1 - - [24/May/2015:15:34:38 +0900] "OPTIONS * HTTP/1.0" 200 - "-" "Apache/2.2.29 (Amazon) (internal dummy connection)" ::1 - - [24/May/2015:15:34:39 +0900] "OPTIONS * HTTP/1.0" 200 - "-" "Apache/2.2.29 (Amazon) (int