B4J Question [SOLVED] CloudKVS_Server and security

Hello,
After having let the server run as a test drive for some days, I have noticed "strange" entries in the logs. They appear some days after the server had been launched (hackers are really good to sniff internet trafic).

They are some like

61.160.213.56 - - [20/Feb/2016:15:44:41 +0000] "GET http://zc.qq.com/cgi-bin/chs/numreg/init? HTTP/1.0" 404 338 "-" "-"
61.160.213.247 - - [21/Feb/2016:12:24:24 +0000] "GET http://zc.qq.com/cgi-bin/chs/numreg/init? HTTP/1.0" 404 338 "-" "-"
115.231.222.14 - - [01/Mar/2016:07:22:51 +0000] "GET http://zc.qq.com/cgi-bin/common/attr?id=260714&r=0.3032006229694173 HTTP/1.1" 404 334 "-" "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; 360SE)"

Click to expand...

And so on...

I am thinking about filtering requests by inserting a new class to reply to GET and POST requests on the same port by sending a null. Do you think it could be enough or should I filter requests with the firewall ? Perhaps could I allow some trafic by adding a dedicated header ?