Hello @neron , Based on the error messages, it looks like you have not flushed the iptables which is requirement for setting up CDSW. You can find more information here:    https://www.cloudera.com/documentation/data-science-workbench/latest/topics/cdsw_requirements_supported_versions.html#networking_security_req   Flush IPTables, Stop Firewalld, Reset weave, Restart host   1) Stop all the instances CM > CDSW > Instances > All > Stop 2) SSH to the master node and clear all iptable rules. iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -t nat -F iptables -t mangle -F iptables -F iptables -X 3) Stop firewalld service and disable it at boot time. systemctl stop firewalld systemctl disable firewalld 4) From CM selectively start only the Docker instance (this is important to carry out next step) 5) Submit the following command to reset weave: # /opt/cloudera/parcels/CDSW/cni/bin/weave reset --force 6) Stop Docker role which we started in step 4. 7). Restart Host # init 6 😎 Start Docker and Master roles to ensure if all POD's comes up fine. If yes, start the Application role.   I hope this will be helpful.      ... View more