TYPO3 Core

On one of my sites, the URL /support.html should redirect to an external URL.

This works fine when the URL is manually entered or clicked in a menu.

However, when the same URL is opened from a google search result, it no redirect occurs. Instead, the page is shown as if it was a normal page.

I've logged the HTTP headers for both requests (also attached as screenshots), and there seems to be little difference:

1. The "bad" request has two additional headers: referer and max-age.
 2. For the "bad" request, cache control headers are added, these are not returned for the "good" request.

I can't find the logic where the redirecting between the page types is done in the core. If someone points me to the place, I'll take a look.