How apache implements domain name forwarding

apache安装后，如果想再添加模块，往往不想重新安装一次，再者，我在安装中发现，并不是安装文件中所有的modules都会被默认安装，这次我添加转发模块的过程中，遇到一些问题，为了以后不走弯路，特地记录下来。

端口转发功能

#开启
        RewriteEngine on
        RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
        RewriteRule .* - [F]

  #转发之后地址的域名不转向到IP和端口
        #RewriteCond %{REQUEST_METHOD} !^POST$
        RewriteCond %{HTTP_HOST} ^xx.com.cn
        RewriteRule ^/(.*) http://xxx.xxx.xxx.xxx:9100/$1 [NC,NE,R=301,P]

    #转发之后地址会跳转到IP和端口
        RewriteCond %{HTTP_HOST} ^c.xx.com.cn
        RewriteRule ^/(.*) http://xxx.xxx.xxx.xxx:8001/$1 [NC,NE]
        RewriteRule ^/a/b.html http://xxx.xxx.xxx.xxx:8002/a/b.html [NC,P]

  #例如
        RewriteEngine on
        RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
        RewriteRule .* - [F]
        RewriteCond %{HTTP_HOST} ^m.abc.com.cn
        RewriteRule ^/(.*) http://xxx.xxx.xxx.xxx:8001/$1 [NC,NE]
        
        <VirtualHost *:8001>
            DocumentRoot "/var/www/html/mobile"
            <Directory "/var/www/html/mobile">
                Options FollowSymLinks IncludesNOEXEC Indexes
                DirectoryIndex index.html index.htm index.php
                AllowOverride All
                Order allow,deny
                Allow from all
            </Directory>
        </VirtualHost>

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