Typo3 HTTP to HTTPS backend not accessible

Question

After trying to switch from http to https I cannot access the typo3 backend and frontend anymore. The browser only shows blank pages.
The install tool is still accessible, however.

My question is: How can I revert all changes?

The only things I did was...

1) adding the following lines to the .htaccess file in the root directory:

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

2) and setting $TYPO3_CONF_VARS[BE][lockSSL] = 2 (default was = 0).

Version: TYPO3 CMS 6.2.0

Answer 1

For reverting, you just have to remove the added lines in the .htaccess and set $TYPO3_CONF_VARS[BE][lockSSL] = 0 (eg via FTP or SSH)