I have a Centos7 server with nginx and google pagespeed. I wanted to clear pagespeed cache for a reason but i saw lots of chinese site caches in my pagespeed cache folder like baidu.com, ly.com, oray.com etc. and also there are folders like "rname", "prop_page".
I have no idea how these folders created. I was getting brute force attacks from china to my SSH but they stopped when I changed the ssh port.
What should I do now?
EDIT: I've found the answer here: https://groups.google.com/forum/#!topic/mod-pagespeed-discuss/zWgCfnAQIkE