TYPO3 v9 has reached its end-of-life September 30th, 2021 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.
You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.
There are many ways to restrict access to pages, content elements and other information from your TYPO3 CMS installation. This can be simple time ranges all the way to requesting a formal authentication. These various options are presented in this chapter.