How easy is it to spoof IP / referrer?

Hi All,

In my apache logs I am getting 100s of errors every hour and each referrer IP Address is Chinese. Some examples of files trying to be accessed are:

sproxy.php
s.php
search.php
search
feed
cgi-bin

Every time I block an address (usually I block the /16 network block of the isp) a different one comes up yet still from china. Also the referrer is always from a different. Here are some examples:

http://www.seeks-search.net/dollar-searching.htm
http://www.luckingsearch.com/dollar-searching.htm
http://xp-search.com/images/ok.htm
http://www.2008-email.com/sprucer.htm

As you can see there is nothing wrong with these sites they are simple htm pages… Could this be a Trojan that is attacking my server or could it be a program that is spoofing the ip and referrer?

Any assistance would be greatly appreciated!

 

 

 

 

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