The first problem was that I hadn't opened the 8089 port of the firewall so I had this error
DC:DeploymentClient - channel=tenantService/handshake Will retry sending handshake message to DS; err=not_connected
The second problem was that the forwarder didn't have the permissions for the files "/var/log/secure.log" and "/var/log/httpd/access.log".
Check @DavidHourani answer for the link to apply an ACL (to solve the problem with permissions)
Thank to @DavidHourani , @FrankVl and @oscar84x for helping me solve my problem
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