Get IP Of Server That Initiated Redirect
Jul 26, 2010
A user clicks a hyperlink in a page. Server A handles the request and redirects the client to a URL on Server B (more specifically I am using the Response.Redirect method in .NET on server A). I have been asked to restrict access to Server B to redirects originating from Server A only (by blocking IP's other than Server A's). At first I thought this could be achieved by using the HTTP 'referer' header, however, it seems it is up to the browser to set this to a URL (rather than IP), and it is not guaranteed to do so.
I guess there is no way to set the HTTP 'referer' on server A in .NET (to server A's IP)? (my intuition is that would be a security hole). So my question is, how can I restrict access to Server B to redirects originating from Server A?
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