Sécuriser Nginx contre les Exploits, les injections, le spam ..
Trouver sur le forum de “La Cabane Libre”
Depuis sa mise en place il y a 2 semaines, j’ai beaucoup moins de spams.
Les mots clés qu’il bloque sont assez explicite, a personnaliser en fonction de l’évolution.
Dans sa globalité, ces blocks protège également de différents exploits.
A mettre dans le vhost, dans la balise server {}
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server { [...] ## 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; } [...] } |
Ne reste plus qu’a recharger le service
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systemctl reload nginx |