Using Apache as forward proxy

<VirtualHost *:80>

  ServerName proxy.yourdomain.com

  ProxyRequests On

  SSLProxyEngine On

  ProxyPass        /revoke https://myca.com/revoke

  ProxyPassReverse /revoke https://myca.com/revoke

  <Location />

    Order Deny,Allow

    Allow from all

  </Location>

</VirtualHost>