Typo3 only allow SSL connections for backend (be) logins
To only allow SSL connections for the backend login area do the following:
1. Edit /typo3conf/localconf.php and insert the following line:
$TYPO3_CONF_VARS['BE']['lockSSL'] = '2';
Parameter description:
0 = No SSL locking
1 = Access is allowed only via https://your-domain.com/typo3
2 = Connections on https://your-domain.com/typo3 are being forwarded to https://your-domain.com/typo3