ΘΩΡΑΚΙΣΜΕΝΕΣ ΠΟΡΤΕΣ

https://erickdiyf242.tumblr.com/post/187121011751/15-best-twitter-accounts-to-learn-about

It's been quite a while given that we went over security doors, so we believed it was about time for a refresher. Let's start by reminding ourselves what they are and why we need them. What is a security door,