But where can I find the replaced key? Locating the new private key The key message in the context of this blog post found the logs is this: ubuntu: SSH auth method: private keyĪs you can read, the insecure key was detected and replaced. This is done to stay in line with the story of the previous post and not something that’s strictly speaking necessary. You may have noticed that 2 network interfaces are brought online in the output created by vagrant up. This started my “ubuntu” VM (I don’t like it when my VMs are called “default”, so I tend to give them better designations): $ vboxmanage list vms | grep ubuntu Ubuntu: /vagrant => /home/martin/vagrant/ubunutu Ubuntu: virtual machine match the version of VirtualBox you have installed on Ubuntu: shared folder errors, please make sure the guest additions within the Ubuntu: prevent things such as shared folders from working properly. Ubuntu: VirtualBox! In most cases this is fine, but in rare cases it can Ubuntu: The guest additions on this VM do not match the installed version of => ubuntu: Checking for guest additions in VM. Ubuntu: Key inserted! Disconnecting and reconnecting using new SSH key. Ubuntu: Removing insecure key from the guest if it's present. Ubuntu: Inserting generated public key within guest. Ubuntu: this with a newly generated keypair for better security. => ubuntu: Running 'pre-boot' VM customizations. => ubuntu: Preparing network interfaces based on configuration. => ubuntu: Clearing any previously set network interfaces. => ubuntu: Fixed port collision for 22 => 2222. => ubuntu: Setting the name of the VM: ubuntu => ubuntu: Checking if box 'ubuntu/xenial64' version '20191204.0.0' is up to date. => ubuntu: Matching MAC address for NAT networking. => ubuntu: Importing base box 'ubuntu/xenial64'. $ vagrant up ubuntuīringing machine 'ubuntu' up with 'virtualbox' provider. For the purpose of this post it doesn’t really matter though. In hindsight I should have gone for 18.04 instead, as it’s much newer. I have decided to use the latest Ubuntu 16.04 box from HashiCorp’s Vagrant cloud for no particular reason. Let’s start with an example to demonstrate the case. If you are unsure about these security related discussion points, review the documentation about creating one’s own Vagrant boxes (section “Default User Settings”) for some additional background information.Ĭontinuing the discussion from the previous post, what does a dynamically injected SSH key imply for the use with the SSH agent? Vagrant cloud, boxes, and the insecure key pair Nevertheless there are occasions when you can’t create your own Vagrant box, and you have to resort to the Vagrant insecure-key-pair-swap procedure instead. The previous post emphasised my preference for using custom Vagrant boxes and my own SSH keys. In an earlier article I described how you could use SSH keys to log into a Vagrant box created by the Virtualbox provider.
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