SharePoint 2013 external site redirecting to internal FQDN

Question

I have setup my SharePoint 2013 server with external access via AAM using the external FQDN as the default and the internal one as 'Intranet'

I can access the site externally using anonymous access but 2 problems:- A. no content shows on the page and B. when I click 'sign in' internally it just loops the page, not actually signing me in, but externally, it just redirects to the internal FQDN but without prompting for credentials.

Answer 1

After much trial and error, I found that ARR has an option that is not on by default when adding a Server Farm:

'Reverse Rewrite Host in Response Headers' under the 'Proxy' section. Once this was turned on, all links pointed to the correct locations!