ACM.115 A devoted and easy-to-identify digital machine for a particular consumer on a zero-trust safety group and private SSH key
This can be a continuation of my sequence on Automating Cybersecurity Metrics.
In our final submit we created a user-specific safety group that limits visitors to a single distant consumer’s IP deal with.
On this submit we’re going to use it to deploy a user-specific EC2 occasion.
Creating a novel VM title per consumer
To be able to create a user-specific VM we have to add the username to the VM. We’re already doing that as a result of we’re passing within the consumer title (Developer) because the NameParam.
We use that within the occasion title through a tag:
We additionally use the username in an output.
Assigning our user-specific Safety Group
In the event you recall we create our consumer VM by passing in a listing of safety group IDs:
We’ll must get the safety group ID for our user-specific safety group. We will get that from the outputs of our safety group stacks by utilizing the stack title concatenated with the precise username.
We’ll must get these outputs so as to add to our operate that deploys our developer vm and add them to the checklist of safety group IDs:
This operate is at the moment for a Linux VM so we’re simply deploying the SSH safety group. Simply add -$consumer to the tip of the stack and export title
Replace the deploy script so as to add the second developer. Discover that I moved the code to get the most recent AMI up so we solely retrieve it as soon as for each builders.
We’ll additionally must deploy an SSH key for the second developer:
And previous to deploying the important thing, a secret the place our script makes an attempt to deploy the important thing:
We’ll in all probability need to assume by way of our new consumer creation course of a bit extra later however for now simply added that code above, deployed the key, then the SSH key, after which the VMs.
After that’s accomplished you may see now we’ve two VMs — one for every developer — with the title of the developer within the VM title.
Chances are you’ll not need usernames in your VM names relying on who has entry to your account. If somebody has the username they might attempt to use the username and enumerate passwords, but when individuals can get the usernames out of the logs or from some other place it’s a little bit of a moot level. Hopefully you might be utilizing MFA — appropriately — so attackers require a couple of issue to get entry to your cloud surroundings.
Now you’ll discover after we begin the brand new situations they’re mechanically working. We need to be certain that we’re solely working situations when in use to economize. We’ll check out that within the subsequent submit.
Comply with for updates.
Teri Radichel
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