vhosts.conf

<VirtualHost *:8080>
ServerAdmin webmaster@dummy-host.example.com
ServerName j.ptl.com
ProxyRequests Off
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyPass / http://127.0.0.1:81/
ProxyPassReverse / http://127.0.0.1:81/
</VirtualHost>

 然后 httpd.conf 里面取消注释以下两行

#LoadModule proxy_module modules/mod_proxy.so
#LoadModule proxy_http_module modules/mod_proxy_http.so


重启后应该正常