一个关于服务器被攻击的问题

我的服务器似乎被攻击，但找不到攻击点
我查看了日志，日志显示如下

200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
186.39.13.131 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:03 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
201.230.179.112 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
174.56.12.235 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
109.105.192.50 - - [17/Dec/2014:20:12:04 -0800] "GET HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
200.89.236.35 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226
186.39.13.131 - - [17/Dec/2014:20:12:04 -0800] "POST HTTP/1.1" 400 226

各位大侠，有能够提供帮助的吗？