Changes

If any of the tests mentioned above failed, you need to check the IP address assignment and/or the routing configuration on all VMs (yours and your partner's) and fix any mistakes until all the tests mentioned above are successful. <font color='red'>Make sure that <b>netfilter (iptables service) </b> is not blocking the traffic and both you and your classmate have enable <b>ip_forward </b> on VM1s.</font>