Thank you for your follow up, I appreciate it . I have been using AWS with ubuntu 20.04 to do the following:   I create an EC2 instance, and in the Network settings, I create Inbound security groups rules for 8080 (Ambari), 22 (SSH), 4200, 9995 (zeppelin), 2222 (Hortonworks file system) From port 22, I install Hortonworks sandbox,  then I can access port 8080 (Ambari) with user maria_dev, and I can access as well the other ports 4200, 2222, and 9995. BUT now AWS supports only  ubuntu 22.04 and 24.04; which do not work to access Hortonworks like Ambari. I go  through the same exact steps that I used with ubuntu 20.04. I can access port 22 (SSH) only so I can install Hortonworks sandbox successfully. But I can not access ports 8080 (Ambari), 4200, 9995; I get errors from the browser:    502 Bad Gateway -- nginx/1.15.0 If it helps, I can send the exact instructions on a pdf file. Thank you again! ... View more