# Node Security

Part of maintaing node security is keeping up to date with Linux firewall management, OS hardening, and SSH hardening.

The Node Security Micro-Certification will be awarded to students that show proficiency in the following areas. ![image](https://user-images.githubusercontent.com/73705450/134786492-28f93603-5a4c-4aab-8ec6-eaa54cf880e4.png)

## Linux Firewall Managment

* block producer rules
* relay rules 

## Linux OS Hardening

## SSH Hardening

* keys 
* port change 
* intrusion prevention 
* 2 factor