https://community.cloudera.com/t5/Support-Questions/502-Bad-Gateway-nginx-1-15-0-problema/m-p/283904#M210887 <P>I resolved this by shutting down the firewall on the HDP Sandbox container:</P><P>sudo systemctl stop firewalld</P><P>sudo systemctl disable firewalld</P> Sun, 24 Nov 2019 21:47:11 GMT GeorgeP 2019-11-24T21:47:11Z