nginx伺服器防sql注入/溢出攻擊/spam及禁User-agents

在配置檔案添加如下字段即可

server {

## 禁SQL注入 Block SQL injections

set $block_sql_injections 0;

if ($query_string ~ “union.*select.*\(“) {

set $block_sql_injections 1;

}

if ($query_string ~ “union.*all.*select.*”) {

if ($query_string ~ “concat.*\(“) {

if ($block_sql_injections = 1) {

return 444;

## 禁掉檔案注入

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_]=(\.\.//?)+”) {

if ($query_string ~ “[a-zA-Z0-9_]=/([a-z0-9_.]//?)+”) {

if ($block_file_injections = 1) {

###一句話木馬

if ( $query_string ~* ".*[\;'\<\>].*" ){

return 404;

## 禁掉溢出攻擊

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})”) {

if ($query_string ~ “_REQUEST(=|\[|\%[0-9A-Z]{0,2})”) {

if ($query_string ~ “proc/self/environ”) {

if ($query_string ~ “mosConfig_[a-zA-Z_]{1,21}(=|\%3D)”) {

if ($query_string ~ “base64_(en|de)code\(.*\)”) {

if ($block_common_exploits = 1) {

## 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”) {

if ($query_string ~ “\b(ambien|blue\spill|cialis|cocaine|ejaculation|erectile)\b”) {

if ($query_string ~ “\b(lipitor|phentermin|pro[sz]ac|sandyauer|tramadol|troyhamby)\b”) {

if ($block_spam = 1) {

## 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”) {

if ($http_user_agent ~ “GetRight”) {

if ($http_user_agent ~ “GetWeb!”) {

if ($http_user_agent ~ “Go!Zilla”) {

if ($http_user_agent ~ “Download Demon”) {

if ($http_user_agent ~ “Go-Ahead-Got-It”) {

if ($http_user_agent ~ “TurnitinBot”) {

if ($http_user_agent ~ “GrabNet”) {

    if ($http_user_agent ~ "WebBench") {

        set $block_user_agents 1;

    }

    if ($http_user_agent ~ "ApacheBench") {

    if ($http_user_agent ~ ^$) {

    if ($http_user_agent ~ "Python-urllib") {

if ($block_user_agents = 1) {

說明：防sql注入/溢出攻擊/spam采用禁掉URL中包含的字段實作，請根據需要合理添加

傳回444,是完全不回應用戶端，比403更加非常節省系統資源

####sql####

 if ($request_uri ~* "(cost\()|(concat\()") {

                return 444;

        }

        if ($request_uri ~* "[+|(%20)]union[+|(%20)]") {

        if ($request_uri ~* "[+|(%20)]and[+|(%20)]") {

        if ($request_uri ~* "[+|(%20)]select[+|(%20)]") {

        } 

## Block SQL injections

    set $block_sql_injections 0;

    if ($query_string ~ "union.*select.*\(") {

        set $block_sql_injections 1;

    if ($query_string ~ "union.*all.*select.*") {

    if ($query_string ~ "concat.*\(") {

    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_]=(\.\.//?)+") {

    if ($query_string ~ "[a-zA-Z0-9_]=/([a-z0-9_.]//?)+") {

    if ($block_file_injections = 1) {

    ## 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})") {

    if ($query_string ~ "_REQUEST(=|\[|\%[0-9A-Z]{0,2})") {

    if ($query_string ~ "proc/self/environ") {

    if ($query_string ~ "mosConfig_[a-zA-Z_]{1,21}(=|\%3D)") {

    if ($query_string ~ "base64_(en|de)code\(.*\)") {

    if ($block_common_exploits = 1) {

    ## 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") {

    if ($query_string ~ "\b(ambien|blue\spill|cialis|cocaine|ejaculation|erectile)\b") {

    if ($query_string ~ "\b(lipitor|phentermin|pro[sz]ac|sandyauer|tramadol|troyhamby)\b") {

    if ($block_spam = 1) {

    ## 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") {

    # Common bandwidth hoggers and hacking tools.

    if ($http_user_agent ~ "libwww-perl") {

    if ($http_user_agent ~ "GetRight") {

    if ($http_user_agent ~ "GetWeb!") {

    if ($http_user_agent ~ "Go!Zilla") {

    if ($http_user_agent ~ "Download Demon") {

    if ($http_user_agent ~ "Go-Ahead-Got-It") {

    if ($http_user_agent ~ "TurnitinBot") {

    if ($http_user_agent ~ "GrabNet") {

    if ($block_user_agents = 1) {

這些規則必須要測試 才能上線。根據實際情況應用！！！

本文轉自 liang3391 51CTO部落格，原文連結:http://blog.51cto.com/liang3391/974952