question Re: Found Error when install the CDP Trial Version in Support Questions

question Re: Found Error when install the CDP Trial Version in Support Questions https://community.cloudera.com/t5/Support-Questions/Found-Error-when-install-the-CDP-Trial-Version/m-p/296768#M218408 Hello <a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/77727">@BSST</a> , thinking it through my impression is that the agents are not able to reach the server and vice versa. The screenshot shows that CM is waiting for the CM agent to heartbeat in, which doesn’t happen. Did you completed this step in [1], please?"Firewalls (such as iptables and firewalld) must be disabled or configured to allow access to ports used by Cloudera Manager, CDH, and related services." Another possibility is that SELinux is enabled. [1] points out that "Security-Enhanced Linux (SELinux) must not block Cloudera Manager or CDH operations" Please check the CM agent logs that would assist to find the root cause.  Thank you:Ferenc [1] <A href="https://docs.cloudera.com/documentation/enterprise/6/release-notes/topics/rg_network_and_security_requirements.html" target="_blank" rel="noopener">https://docs.cloudera.com/documentation/enterprise/6/release-notes/topics/rg_network_and_security_requirements.html</A>  Thu, 28 May 2020 08:48:41 GMT Bender 2020-05-28T08:48:41Z