What is a Firewall?
Your Firewall is one of the most imperative pieces of Software on your system. You Firewall does three of the most important things in the game: Your Firewall protects you from being detected during an NMAP scan, it protects your system from being Exploited, and, most importantly, it mitigates all DDoS attacks targeted towards you.
Exploits - For example; Your Firewall is 30.0, yet your attacker's Exploit(s) are level 30.1. This mean that they can bypass your Firewall with their higher-level exploit(s) and hack into your system. Note that they CAN log in as root if both of the attacker's Exploits bypass your Firewall, giving them the normal permissions of a Cracker.
NMAP - For example; Your Firewall is 30.0, yet the Scanner's NMAP is 30.1, this mean that they can scan their own system, (If you connected), and find your IP, whether you cleared the logs or not. However, if your Firewall is 30.1 and the scanner's NMAP is 30.0, then your IP remains safely hidden.
DDoS Mitigating - For example; I apologize, as I'm still unsure as to how this works, but I'm pretty sure the concept of the Firewall mitigating the DDoS Attack relies solely on the Firewall's version. The higher the Firewall's level, the better it mitigates the attack. That simple.
Where can I get the Firewall?
Simply head on over to the Download Center and download it from there. Logs are not recorded, so don't worry about clearing them.
How do I research my Firewall?
To research a piece of Software, head to the University tab on your side-menu, then from there select the piece of Software you wish to research. Follow through and research the Software.
It says I have no software to research!
This is because you have not bought the License.
Alternatively, you can go into your Software tab on the side-menu, and click the little blue circle icon that's located next to the Software's name. From there, you can buy the license, (If you haven't already), and research the software following the steps I have provided above.