Cloud Security: Inter-Host Docker Container Communication using Vault Dynamic Secrets

In this paper we attempt to address Inter-Host Docker container communications security issues by incorporating a latest approach provided by Vault Hashicorp dynamic secret mechanism for managing SSH keys and server credentials. A simulation environment is prepared for Inter-Host container communication consisting of one host running locally and the peer host running as an AWS EC2 instance in cloud. Industry standard monitoring tool Grafana is used in the simulation environment to highlight the security impacts for any organization. We also draw special attention to some of the security vulnerabilities in docker container like ARP spoofing, Integrity of the docker host and containers and MAC flooding attacks. We try to list some best practices to be followed when using docker containers in any production deployments.