A firewall imposes restrictions on incoming and outgoing packets to and from the private network. All the traffic, whether incoming or outgoing, must pass through the firewall, and only authorized traffic is allowed to pass through it.
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Security Benefits of Firewall Protection
The primary approach of using a Firewall is to deal with numerous point regarding security of your Server or Host.
Some of the segments that covers under these benefits are:
1. Overall Controlled Access to Site Systems
2. Concentrated Security
3. Enhance System Privacy
4. Shield from Network Misuse, Policy Enforcement
5. Defending Vulnerable Services
A Linux Firewall acts as a shield for your system through five different stages, from the time it's installed on your computer to the appearance of the ransom warning on your screen.