So I have two SharePoint farms running like so:
app1.subdomain.domain.com (2013, source) app2.subdomain.domain.com (2010, destination)
we have an iframe in app2 page pointing to a page in app1
after moving app1 to a different server farm, IE is complaining and refusing to display the iframe
if I add allowframing to the source farm it kinda works. in chrome its working 100%, in IE I get a lot of script errors and everything is broken in the frame.
<WebPartPages:AllowFraming runat="server" />
apparently I have to write an http module, but I was under the impression that this should only happen on different domains, and would like to clear that out.