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→Generating a Self-signed Certificate
We'll be generating our own, mostly in order to avoid paying for the certificate. We won't have too much time to get into the details of what all the following commands do. They are from [https://www.e-rave.nl/create-a-self-signed-ssl-key-for-postfix this blog post]. If you don't understand what he's talking about on that page but would like to understand - I'll again recommend the book Crypto by Steven Levy for reading outside this course.
The public key cryptography concepts are the same in this lab as the SSH lab, but the terminology is slightly different. A simple way to look at it is:
* Your .key file is your private key.
* Your .crt file is your public key.
== Postfix + TLS ==
