I got a strange in apache access_log
117.86.199.18 - - [27/Jul/2014:10:42:10 +0200] "GET http://hotel.qunar.com/render/hoteldiv.jsp?&__jscallback=XQScript_4 HTTP/1.1" 302 256
It looks that somebody/something is trying to use my server as proxy. The question: is this dangerous? There is a way to forbid using my web server as a proxy?