How protect from http flood attack ?

[paisley]

Hello,

I have a lots of "W" Sending Reply,
In HTTP log i see lots of:
186.5.179.5 - - [07/Apr/2014:03:37:04 +0200] "HEAD / HTTP/1.0" 200 250
127.0.0.1 - - [07/Apr/2014:04:31:35 +0200] "OPTIONS * HTTP/1.0" 200 112
127.0.0.1 - - [07/Apr/2014:04:31:36 +0200] "OPTIONS * HTTP/1.0" 200 112
127.0.0.1 - - [07/Apr/2014:04:36:32 +0200] "OPTIONS * HTTP/1.0" 200 112
189.124.138.134 - - [07/Apr/2014:04:36:49 +0200] "HEAD / HTTP/1.0" 200 250
127.0.0.1 - - [07/Apr/2014:04:38:11 +0200] "OPTIONS * HTTP/1.0" 200 112
127.0.0.1 - - [07/Apr/2014:04:39:23 +0200] "OPTIONS * HTTP/1.0" 200 112

Anyone know how to stop this attack ?

 

[paisley]

I also see a lots of GET /.qtkil/ HTTP/1.1

 

[scsi]

Maybe someone has a hidden folder.

find /home -iname .qtkil -print