Hi @igorufrn
The short answer is that there is no "free version of the CDH" available from Cloudera for download. For the details, you can read the responses posted when a question similar to yours was previously asked and answered here:
Ho[w] to subscribe [to] CDH 6.3.2 express
The credentials required to access the private repository that all legacy versions of Cloudera's distribution are now available from are not generally the same ones to access Cloudera's website or the Cloudera community. In other words, the personal email address you use for logging into the Cloudera community isn't going to work as a userid for accessing the private repository archive.cloudera.com. Instead, people with a valid Cloudera subscription can generate repository credentials from a CDH license key, and there is a link included in the community thread I mentioned above to an announcement which in turn has links to extensive documentation on how to download and install certain earlier versions of CDH.
If you are genuinely looking to evaluate a current data platform for use within your company, you can currently do so without a preexisting Cloudera subscription by downloading and installing the Trial Version of CDP Private Cloud Base Edition of Cloudera Data Platform.
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