![]() There are many references on the internet about how to generate key pairs that can be used for ssh, such as for GitHub, Amazon AWS, Google Compute Engine, and there’s always the ssh-keygen(1) man page. In order to efficiently and (arguably) securely connect to multiple machines from one machine, we’ll be using Public Key Authentication in SSH. Configuring Ansible to use an SSH bastion host.Using SSH bastion hosts with AWS, and dynamically locating them with EC2 tags.SSH connection multiplexing, port forwarding, and use as a SOCKS proxy.Dynamically located SSH bastion hosts with AWS.In follow-up posts, I’ll cover these related topics: Making the connection transparently using the bastion host based on destination.Making the connection through the bastion host to the destination machine in one step.The mechanics of using SSH to connect to the bastion host, and from there SSH to another machine without having to store authentication information on the bastion host.The purpose of using a bastion host for access is clearly a matter of increased security. We won’t be going deeply into the security implications in this article. We will be demonstrating how to make that connection transparent and automatic, not only for manual SSH connections but also for programmatic SSH connections such as with GIT or Ansible. ![]() Here we will be using a bastion host to serve as a SSH server that we can “hop” through into another machine (real or VM), allowing users to automate remote task execution over SSH. However, adding bastion hosts creates complexity in remote execution of scripts or deployment tasks. Having a bastion host is a good security practice commonly deployed to strengthen yet simplify security controls of an environment. It is hardened in this manner primarily due to its location and purpose, which is either on the outside of the firewall or in the DMZ and usually involves access from untrusted networks or computers. The computer generally hosts a single application, for example a proxy server, and all other services are removed or limited to reduce the threat to the computer. A Bastion host is a special purpose computer on a network specifically designed and configured to withstand attacks. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |