我们用得最多的无非就是使用php,asp,asp.net这种代码来实现sql防注入***
防御原理：
1. 通过以上配置过滤基本的url中的注入关键字；
2. 当然，数据库中的用户密码得加密存放 ；
3. php程序进行二次过滤，过滤GET和POST变量中的关键字；
4. 生产环境关闭PHP和MySQL的错误信息。
最近网站受到的***比较多，用下面的方法减轻了很多，记录下来以后备用。
#禁止sql注入 if ($query_string ~* ".*[\;\'\<\>].*" ){ return 404; } if ($request_uri ~* "(cost\()|(concat\()") { return 404; } if ($request_uri ~* "[+|(%20)]union[+|(%20)]") { return 404; } if ($request_uri ~* "[+|(%20)]and[+|(%20)]") { return 404; } if ($request_uri ~* "[+|(%20)]select[+|(%20)]") { return 404; } if ($query_string ~ "(<|%3C).*script.*(>|%3E)") { return 404; } if ($query_string ~ "GLOBALS(=|[|%[0-9A-Z]{0,2})") { return 404; } if ($query_string ~ "_REQUEST(=|[|%[0-9A-Z]{0,2})") { return 404; } if ($query_string ~ "proc/self/environ") { return 404; } if ($query_string ~ "mosConfig_[a-zA-Z_]{1,21}(=|%3D)") { return 404; } if ($query_string ~ "base64_(en|de)code(.*)") { return 404; } if ($query_string ~ "select") { return 404; }
#禁止文件注入 ## Block file injections set $block_file_injections 0; if ($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 444; }
## 禁掉溢出*** 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 444; }
## 禁spam字段 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|bluespill|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 444; }
## 禁掉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 $block_user_agents 1; } if ($http_user_agent ~ "WebBench") { set $block_user_agents 1; } if ($http_user_agent ~ "ApacheBench") { set $block_user_agents 1; } if ($http_user_agent ~ ^$) { set $block_user_agents 1; } if ($http_user_agent ~ "Python-urllib") { set $block_user_agents 1; } if ($block_user_agents = 1) { return 444; } |
把以上代码保存为block.conf，放在nginx的conf根目录，在需要防护的网站上用include引入就可以了。
include block.conf |