系统运维
1、默认使用curl命令访问：
# curl -I http://172.17.0.5
2、修改nginx.conf配置文件，在http配置段中新增如下代码：
# vim /usr/local/nginx/conf/nginx.conf
server_tokens off;
3、修改fastcgi.conf配置文件，注释如下代码：
# vim /usr/local/nginx/conf/fastcgi.conf
fastcgi_param? SERVER_SOFTWARE? nginx/$nginx_version;
4、重载Nginx：
# nginx -s reload
5、使用curl命令访问：
# curl -I http://172.17.0.5
6、伪造Nginx的名称和版本号：
# vim /usr/src/nginx-1.16.1/src/core/nginx.h，修改如下代码
#define NGINX_VERSION 1.16.1 –> #define NGINX_VERSION 2.3.2
#define NGINX_VER nginx/ NGINX_VERSION –> #define NGINX_VER Tengine/ NGINX_VERSION
# cd /usr/src/nginx-1.16.1
# ./configure –prefix=/usr/local/nginx –user=nginx –group=nginx –with-threads –with-file-aio –with-http_ssl_module –with-http_v2_module –with-http_realip_module –with-http_addition_module –with-http_xslt_module –with-http_image_filter_module –with-http_geoip_module –with-http_sub_module –with-http_dav_module –with-http_flv_module –with-http_mp4_module –with-http_gunzip_module –with-http_gzip_static_module –with-http_auth_request_module –with-http_random_index_module –with-http_secure_link_module –with-http_degradation_module –with-http_slice_module –with-http_stub_status_module –with-http_perl_module –with-mail –with-mail_ssl_module –with-stream –with-stream_ssl_module –with-stream_realip_module –with-stream_geoip_module –with-stream_ssl_preread_module –with-compat –with-pcre
# make && make install
# cd /usr/local/nginx/conf
# vim nginx.conf，删除之前新增的代码：server_tonkens off;
# nginx -s stop
# nginx
7、使用curl命令访问：
# curl -I http://172.17.0.5
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