今天知道了一个 反向代理，是apache 的一个功能，这里记录一下

NameVirtualHost *:80
<VirtualHost *:80>
ServerName 域名:80
ServerAlias 域名DocumentRoot "d:/AppServ/www"

    #
    # Possible values for the Options directive are "None", "All",
    # or any combination of:
    #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
    #
    # Note that "MultiViews" must be named *explicitly* --- "Options All"
    # doesn‘t give it to you.
    #
    # The Options directive is both complicated and important.  Please see
    # http://httpd.apache.org/docs/2.2/mod/core.html#options
    # for more information.
    #
    Options Indexes FollowSymLinks MultiViews ExecCGI

    #   Options FileInfo AuthConfig Limit
    #
    AllowOverride All

    #
    # Controls who can get stuff from this server.
    #
    Order allow,deny
    Allow from all
</Directory>
</VirtualHost>

<VirtualHost *:80>
    ProxyRequests Off
    ServerName 域名2:80
    ServerAlias 域名2
    ProxyPass / http://ip+端口/
    ProxyPassReverse / http://ip+端口/
</VirtualHost>