After logout browser back button shows cached protected page

[sal]

After logout browser back button shows cached protected page.
Anyone have the same issue on contao version 2.11.2

tested on FF 13

[Ruud]

Why is that a Contao specific issue, or should Contao send headers that disable caching for protected pages?

[sal]

Ok

I can confirm that this works..
I have modified file FrontendTemplate.php at line 199 to 203 and replaced with this:

header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
header('Pragma: no-cache');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Expires: Fri, 06 Jun 1975 15:10:00 GMT');