#Specifies the value for maximum file descriptors that can be opened by this process. #最大文件打开数(连接),可设置为系统优化后的ulimit -HSn的结果 worker_rlimit_nofile 51200;
This directive permits or forbids the use of thesocket options TCP_NOPUSH on FreeBSD or TCP_CORK on Linux. This option is onlyavailable when using sendfile.
Setting this option causes nginx to attempt to sendit’s HTTP response headers in one packet on Linux and FreeBSD 4.x
You can read more about the TCP_NOPUSH and TCP_CORKsocket options here.
linux 下是tcp_cork,上面的意思就是说,当使用sendfile函数时,tcp_nopush才起作用,它和指令tcp_nodelay是互斥的。tcp_cork是linux下tcp/ip传输的一个标准了,这个标准的大概的意思是,一般情况下,在tcp交互的过程中,当应用程序接收到数据包后马上传送出去,不等待,而tcp_cork选项是数据包不会马上传送出去,等到数据包最大时,一次性的传输出去,这样有助于解决网络堵塞,已经是默认了。
也就是说tcp_nopush = on 会设置调用tcp_cork方法,这个也是默认的,结果就是数据包不会马上传送出去,等到数据包最大时,一次性的传输出去,这样有助于解决网络堵塞。
###start#### if ( $query_string ~* ".*[\;'\<\>].*" ){ return 444; } if ($query_string ~* ".*(insert|select|delete|update|count|\*|%|master|truncate|declare|\'|\;|and|or|\(|\)|exec).* ") { return 444; } if ($request_uri ~* "(cost\()|(concat\()") { return 444; } if ($request_uri ~* "[+|(%20)]union[+|(%20)]") { return 444; } if ($request_uri ~* "[+|(%20)]and[+|(%20)]") { return 444; } if ($request_uri ~* "[+|(%20)]select[+|(%20)]") { return 444; } 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 448; } 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; } 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 444; } set $block_user_agents 0; if ($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 444; }