面试官问：Nginx优化思路有哪些？网站如何实现防盗链？|key|dns|nginx|centos01

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前几天，有个读者向我吐槽，找了很久的工作，好不容易熬到到了二面（技术面，如果过了就基本定了）。谁知道没有准备充分，被一道题给直接挂掉了。

这道题就是：Nginx 的优化思路有哪些？网站的防盗链如何做？实际工作中有哪些类似的安全经验？结果支支吾吾半天没讲到重点，结果就可想而知了。。。

所以，今天就带大家来一起重新复习一下这方面的知识点。

拓扑图

推荐步骤 1、在Centos01上安装Nginx，设置网站根目录/www使用域名www.huhu.com访问

2、在Centos02上安装DNS使用域名访问Centos01上使用域名www.huhu.com访问，Centos03使用yum安装apache使用域名www.huyan.com访问

3、在www.huhu.com域名的网站隐藏Nginx版本、查看Nginx管理用户、设置网页缓存、配置日志切割、配置Nginx日志切割、设置超时时间

4、在www.huhu.com网站配置防盗链防止www.huyan.com盗 www.huhu.com的连接

一、在Centos01上安装Nginx，设置网站根目录/www使用域名www.huhu.com访问

挂载Centos7系统光盘

[root@centos01 ~]# mount /dev/cdrom /mnt/

mount: /dev/sr0 写保护，将以只读方式挂载

创建nginx管理账户

[root@centos01 ~]# useradd -M -s /sbin/nologin nginx传输nginx1.16.1文件[root@centos01 ~]# rz z waiting to receive.**B0100000023be50安装依赖文件[root@centos01 ~]# yum -y install pcre-devel zlib-devel解压nginx配置文件[root@centos01 ~]# yum -y install pcre-devel zlib-devel修改源代码程序[root@centos01 ~]# vim /usr/src/nginx-1.16.1/src/core/nginx.h 13 #define NGINX_VERSION "7.0" 14 #define NGINX_VER "IIS/" NGINX_VERSION 22 #define NGINX_VAR "IIS"修改Nginx数据包请求头部[root@centos01 ~]# vim/usr/src/nginx-1.16.1/src/http/ngx_http_header_filter_module.c

49 static u_char ngx_http_server_string[] = "Server: IIS" CRLF;li配置Nginx[root@centos01 ~]# cd /usr/src/nginx-1.16.1/ [root@centos01 nginx-1.16.1]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_stub_status_module #编译安装Nginx [root@centos01 nginx-1.16.1]# make && make install

# 优化命令 [root@centos01 nginx-1.16.1]# ln -s /usr/local/nginx/sbin/* /usr/local/sbin/ [root@centos01 nginx-1.16.1]# cd [root@centos01 ~]# nginx -t nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

# 创建网站根目录www 设置网站主页 [root@centos01 ~]# mkdir /www/ [root@centos01 ~]# echo "www.huhu.com" > /www/index.html

二、在 Centos03 上安装 DNS 使用域名访问 Centos01 上使用域名http://www.bdqn.com/访问，Centos02 使用 yum 安装 apache 使用域名http://www.benet.com/访问。

配置DNS

1）centos01配置DNS，重启网卡服务

[root@centos01 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens32 [root@centos01 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens32 TYPE=Ethernet BOOTPROTO=static NAME=ens32 DEVICE=ens32 ONBOOT=yes IPADDR=192.168.100.10 NATMACK=255.255.255.0 DNS1=192.168.100.30

[root@centos01 ~]# systemctl restart network [root@centos01 ~]# cat /etc/resolv.conf # Generated by NetworkManager nameserver 192.168.100.302）centos02配置DNS 重启网卡服务[root@centos02 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens32 [root@centos02 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens32 TYPE=Ethernet BOOTPROTO=static NAME=ens32 DEVICE=ens32 ONBOOT=yes IPADDR=192.168.100.20 NATMACK=255.255.255.0 DNS1=192.168.100.30

[root@centos02 ~]# systemctl restart network [root@centos02 ~]# cat /etc/resolv.conf # Generated by NetworkManager nameserver 192.168.100.303）centos03配置DNS 重启网卡服务[root@centos03 ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens32 [root@centos03 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens32 TYPE=Ethernet BOOTPROTO=static NAME=ens32 DEVICE=ens32 ONBOOT=yes IPADDR=192.168.100.30 NATMACK=255.255.255.0 DNS1=192.168.100.30 [root@centos03 ~]# systemctl restart network [root@centos03 ~]# cat /etc/resolv.conf # Generated by NetworkManager nameserver 192.168.100.30挂载centos7系统光盘安装DNS[root@centos03 ~]# mount /dev/cdrom /mnt/ mount: /dev/sr0 写保护，将以只读方式挂载 [root@centos03 ~]# ls /mnt/ CentOS_BuildTag EULA images LiveOS repodata RPM-GPG-KEY-CentOS-Testing-7 EFI GPL isolinux Packages RPM-GPG-KEY-CentOS-7 TRANS.TBL root@centos03 ~]# rpm -ivh /mnt/Packages/bind-9.9.4-50.el7.x86_64.rpm [root@centos03 ~]# rpm -ivh /mnt/Packages/bind-chroot-9.9.4-50.el7.x86_64.rpm配置DNS主配置文件[root@centos03 ~]# echo "" > /etc/named.conf [root@centos03 ~]# vim /etc/named.conf options { listen-on port 53 { any; }; directory "/var/named/"; }; zone "huhu.com" IN { type master; file "/var/named/huhu.com.zone"; }; zone "huyan.com" IN { type master; file "/var/named/huyan.com.zone"; };配置DNS区域配置文件第一台服务器[root@centos03 ~]# vim /var/named/huhu.com.zone $TTL 86400 @ SOA huhu.com. root.huhu.com. ( 2023021015 1H 15M 1W 1D ) @ NS centos03.huhu.com. centos03 A 192.168.100.30 www A 192.168.100.10 [root@centos03 ~]# named-checkzone huhu.com /var/named/huhu.com.zone zone huhu.com/IN: loaded serial 2023021015 OK配置第二台DNS区域配置文件[root@centos03 ~]# vim /var/named/huyan.com.zone $TTL 86400 @ SOA huyan.com. root.huyan.com. ( 2023021015 1H 15M 1W 1D ) @ NS centos03.huyan.com. centos03 A 192.168.100.30 www A 192.168.100.20 [root@centos03 ~]# named-checkzone huyan.com /var/named/huyan.com.zone zone huyan.com/IN: loaded serial 2023021015 OK启动DNS服务监听端口[root@centos03 ~]# systemctl stop named [root@centos03 ~]# systemctl start named [root@centos03 ~]# netstat -anptu | grep named tcp 0 0 192.168.100.30:53 0.0.0.0:* LISTEN 2430/named tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 2430/named tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN 2430/named tcp6 0 0 ::1:953 :::* LISTEN 2430/named udp 0 0 192.168.122.1:53 0.0.0.0:* 2430/named udp 0 0 192.168.100.30:53 0.0.0.0:* 2430/named udp 0 0 127.0.0.1:53 0.0.0.0:* 2430/named验证访问 www.huhu.com

挂centos7系统光盘 yum安装apache[root@centos02 ~]# mount /dev/cdrom /mnt/ mount: /dev/sr0 写保护，将以只读方式挂载 [root@centos02 ~]# ls mn ls: 无法访问mn: 没有那个文件或目录 [root@centos02 ~]# ls /mnt/ CentOS_BuildTag EFI EULA GPL images isolinux LiveOS Packages repodata RPM-GPG-KEY-CentOS-7 RPM-GPG-KEY-CentOS-Testing-7 TRANS.TBL [root@centos02 ~]# yum -y install httpd设置开机自启设置网站主页[root@centos02 ~]# systemctl restart httpd [root@centos02 ~]# systemctl enable httpd Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service. [root@centos02 ~]# echo "www.huyan.com" > /var/www/html/index.html验证访问www.huyan.com

三、在www.huhu.com域名的网站隐藏Nginx版本、查看Nginx管理用户、设置网页缓存、配置日志切割、配置Nginx日志切割、设置超时时间。

#隐藏版本和优化管理Nginx进程用户修改Nginx主配置文件 vim /usr/local/nginx/conf/nginx.conf user nginx; worker_processes 1; pid logs/nginx.pid; events { worker_connections 1024; http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server_tokens Off; server { listen 192.168.100.10:80; server_name www.huhu.com; charset utf-8; access_log logs/www.huhu.com.access.log; location / { root /www/; index index.html index.htm; [root@centos01 ~]# nginx -t nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

#查看Nginx进程 [root@centos01 ~]# ps -ef | grep nginx root 5469 1 0 00:03 ? 00:00:00 nginx: master process nginx nginx 5470 5469 0 00:03 ? 00:00:00 nginx: worker process root 5472 1186 0 00:03 pts/0 00:00:00 grep --color=auto nginx

验证隐藏版本

# 设置网页缓存时间修改Nginx主配置文件支持图片缓存 [root@centos01 ~]# vim /usr/local/nginx/conf/nginx.conf user nginx; worker_processes 1; pid logs/nginx.pid; events { worker_connections 1024; http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server_tokens Off; server { listen 192.168.100.10:80; server_name www.huhu.com; charset utf-8; access_log logs/www.huhu.com.access.log; location ~ \.(gif|jpg|png|jpeg|bmp|swf)$ { root /www; expires 1d; location / { root /www; index index.html index.htm; [root@centos01 ~]# nginx -t nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

#设置网页加载图片 [root@centos01 ~]# cd /www/ [root@centos01 www]# rz [root@centos01 www]# ls index.html logo.jpg

#重启Nginx服务 [root@centos01 www]# killall nginx [root@centos01 www]# killall nginx nginx: no process found [root@centos01 www]# nginx [root@centos01 www]# cd

验证网页缓存

#配置Nginx日志切割、设置超时时间创建存储日志切割目录 [root@centos01 ~]# mkdir /nginx_log

#编写日志切割脚本 [root@centos01 ~]# vim /opt/nginx_log_.sh #!/bin/bash d=$(date -d "-1 day" "+%Y%m%d") logs_path="/nginx_log/" pid_path="/usr/local/nginx/logs/nginx.pid" [ -d $logs_path ] || mkdir -p $logs_path mv /usr/local/nginx/logs/www.huhu.com.access.log ${logs_path}/www.huhu.com-access.log-$d kill -USR1 $(cat $pid_path) find $logs_path -mtime +30 |xargs rm -rf

#添加执行权限 [root@centos01 ~]# chmod +x /opt/nginx_log_.sh

#执行脚本 [root@centos01 ~]# sh /opt/nginx_log_.sh

#验证切割 [root@centos01 ~]# ls /nginx_log/ www.huhu.com-access.log-20230210

#编辑计划任务，十分钟切割一次 [root@centos01 ~]# crontab -e */10 * * * * /opt/nginx_log_.sh验证Nginx日志切割

#优化Nginx保持连接修改Nginx主配置文件 [root@centos01 ~]# vim /usr/local/nginx/conf/nginx.conf user nginx; worker_processes 2; pid logs/nginx.pid; events { worker_connections 2048; http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 5; server_tokens Off; client_header_timeout 5; client_body_timeout 5; server { listen 192.168.100.10:80; server_name www.huhu.com; charset utf-8; access_log logs/www.huhu.com.access.log; location ~ \.(gif|jpg|png|jpeg|bmp|swf)$ { root /www; expires 1d; location / { root /www; index index.html index.htm;

#重新启动Nginx [root@centos01 ~]# killall nginx [root@centos01 ~]# killall nginx nginx: no process found [root@centos01 ~]# [root@centos01 ~]# nginx

#验证优化Nginx保持连接 [root@centos01 ~]# curl -I www.huhu.com HTTP/1.1 200 OK Server: IIS Date: Fri, 10 Feb 2023 16:45:44 GMT Content-Type: text/html; charset=utf-8 Content-Length: 13 Last-Modified: Fri, 10 Feb 2023 14:56:16 GMT Connection: keep-alive ETag: "63e65b10-d" Accept-Ranges: bytes四、在www.huhu.com网站配置防盗链防止www.huyan.com盗www.huhu.com的连接#上传错误图片 [root@centos01 ~]# cd /www/ [root@centos01 www]# ls index.html logo.jpg [root@centos01 www]# rz z waiting to receive.**B0100000023be50 [root@centos01 www]# ls error.png index.html logo.jpg

#修改Nginx主配置文件 user nginx; worker_processes 2; pid logs/nginx.pid; events { worker_connections 2048; } http { include mime.types; default_type application/octet-stream; sendfile on; server { listen 192.168.100.10:80; server_name www.huhu.com; charset utf-8; access_log logs/www.huhu.com.access.log; location ~* \.(gif|jpg|swf)$ { valid_referers none blocked *.huhu.com huhu.com; if ($invalid_referer) { rewrite ^/ http://www.huhu.com/error.png; } } location / { root /www; index index.html index.htm; } } } [root@centos01 ~]# nginx -t nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

#重新启动Nginx [root@centos01 ~]# killall nginx [root@centos01 ~]# killall nginx nginx: no process found [root@centos01 ~]# [root@centos01 ~]# nginx

#centos02模拟盗取centos01链接 [root@centos02 ~]# vim /var/www/html/index.html www.huyan.com "http://www.huhu.com/logo.jpg" />

重启服务

[root@centos02 ~]# systemctl restart httpd

验证防盗链

centos01图片

作者：蔚蓝的珊瑚海 https://blog.51cto.com/u_15829479/6076322

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