When wordpress need to integrated in another website, that website has a public domain name: e.g. www.abc.com
In that public (or extranet / intranet) web application, the integration is done through an iframe.
By using iframe as a container, referring to another page / website / ...
As more and more browsers are closing up security. Most browsers do not allow cross-domain scripting, when the embedded application is using the same sub-domain.
It will be a requirement to setup reserver proxy (with root access or other way possible ) in clicktogo, it will be good to support an option to setup reserver proxy for the server setting for the host to be able to coneect to external system safely.