ECS Multinode install fails at the autenitication step

Hi I am trying to install ECS multimode cluster (v 2.2.x) virtual edition and I have installed CentOS7 with docker service. When I run the Python script to do the step 1 of the installation, it proceeds up to the point of authentication. I have a proxy server configured in the host which was throwing a 403 error. I disabled the proxy and firewalld I am still getting the error attached. i.e. connection refused. Can someone help with finding the solution? Thanks