Question

I’m trying to find out if it’s possible to detect whether a user is visiting the site from a given domain (network domain not website domain) for example is the machine on the businessname.local domain.

I currently implement Forms Authentication for the website which is perfectly suitable. I am looking at implementing an Intranet site for the company.

This would be a completely separate project from the primary site. My goal is to detect that a users computer is on the domain and present them with the option to visit the Intranet and if they wish to do so then I would redirect the user.

Is this possible?

EDIT:

Just for clarification. I’m not asking about implementing Active-Directory Authentication for the Intranet site (I know how to do this). I’m simply wondering if I a method exists to detect the domain and offer to redirect if it’s applicable for a given user.

Answer 1

The solution I came up with to solve the issue was to create a Controller on the intranet site that was simply used to return a true or false depending on Active Directory authentication for the machine accessing it.

The intended result was only to display the option of a redirect…not to display actual content so I don’t believe this opens up any security issues (please correct me if I’m wrong).

$(document).ready(function () {
    $.get('URL-to-test-controller', function (data) {
        if ($.trim(data) === "true") {
            if (askAboutRedirect()) {
                window.location = "intranetaddress";
            }
        }
    });
});

Due to the cross-domain issues the Controller providing the result has the Access-Control-Allow-Origin header set…

Response.AddHeader("Access-Control-Allow-Origin", "requesting server");

As per W3.org