东拚西凑了一些有用的东东，可以贴在nginx配置文件中,

功能比较杂，防盗链、防注入等等

location = /robots.txt { access_log off; log_not_found off; }
location = /favicon.ico { access_log off; log_not_found off; }
   location ~ /\. { access_log off; log_not_found off; deny all; }
   location ~ ~$ { access_log off; log_not_found off; deny all; }
   location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$ { expires 30d; }
   location ~ .*\.(js|css)?$ {  expires  12h; }
   location ~* \.(gif|jpg|png|swf|flv)$
      if ($host !=’*.yourdomain.com’) {
          return 403;
          }
   ## Block SQL injections
   set $block_sql_injections 0;
   if ($query_string ~ "union.*select.*\(") {
       set $block_sql_injections 1;
   }
   if ($query_string ~ "union.*all.*select.*") {
       set $block_sql_injections 1;
   }
   if ($query_string ~ "concat.*\(") {
       set $block_sql_injections 1;
   }
   if ($block_sql_injections = 1) {
       return 403;
   }
   ## Block file injections
   set $block_file_injections 0;
   if ($query_string ~ "[a-zA-Z0-9_]=http://") {
       set $block_file_injections 1;
   }
   if ($query_string ~ "[a-zA-Z0-9_]=(\.\.//?)+") {
       set $block_file_injections 1;
   }
   if ($query_string ~ "[a-zA-Z0-9_]=/([a-z0-9_.]//?)+") {
       set $block_file_injections 1;
   }
   if ($block_file_injections = 1) {
       return 403;
   }
   ## Block common exploits
   set $block_common_exploits 0;
   if ($query_string ~ "(<|%3C).*script.*(>|%3E)") {
       set $block_common_exploits 1;
   }
   if ($query_string ~ "GLOBALS(=|\[|\%[0-9A-Z]{0,2})") {
       set $block_common_exploits 1;
   }
   if ($query_string ~ "_REQUEST(=|\[|\%[0-9A-Z]{0,2})") {
       set $block_common_exploits 1;
   }
   if ($query_string ~ "proc/self/environ") {
       set $block_common_exploits 1;
   }
   if ($query_string ~ "mosConfig_[a-zA-Z_]{1,21}(=|\%3D)") {
       set $block_common_exploits 1;
   }
   if ($query_string ~ "base64_(en|de)code\(.*\)") {
       set $block_common_exploits 1;
   }
   if ($block_common_exploits = 1) {
       return 403;
   }
   ## Block spam
   set $block_spam 0;
   if ($query_string ~ "\b(ultram|unicauca|valium|viagra|vicodin|xanax|ypxaieo)\b") {
       set $block_spam 1;
   }
   if ($query_string ~ "\b(erections|hoodia|huronriveracres|impotence|levitra|libido)\b") {
       set $block_spam 1;
   }
   if ($query_string ~ "\b(ambien|blue\spill|cialis|cocaine|ejaculation|erectile)\b") {
       set $block_spam 1;
   }
   if ($query_string ~ "\b(lipitor|phentermin|pro[sz]ac|sandyauer|tramadol|troyhamby)\b") {
       set $block_spam 1;
   }
   if ($block_spam = 1) {
       return 403;
   }
   ## Block user agents
   set $block_user_agents 0;
   # Don't disable wget if you need it to run cron jobs!
   #if ($http_user_agent ~ "Wget") {
   #    set $block_user_agents 1;
   #}
   # Disable Akeeba Remote Control 2.5 and earlier
   if ($http_user_agent ~ "Indy Library") {
       set $block_user_agents 1;
   }
   # Common bandwidth hoggers and hacking tools.
   if ($http_user_agent ~ "libwww-perl") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "GetRight") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "GetWeb!") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "Go!Zilla") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "Download Demon") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "Go-Ahead-Got-It") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "TurnitinBot") {
       set $block_user_agents 1;
   }
   if ($http_user_agent ~ "GrabNet") {
       set $block_user_agents 1;
   }
   if ($block_user_agents = 1) {
       return 403;
   }

使用方法

1、按照rpm的标准安装的路径，假设配置文件为/etc/nginx/nginx.conf 和/etc/nginx/conf.d/default.conf ，将上述内容保存为 /etc/nginx/nginx-extra.conf

2、在server 栏中加入，“ include nginx-extra.conf ” ，也就是如下格式:

server {
[...]
include nginx-extra.conf
}