Firewalls , also known as FireWall terminology in computer networking, can be called firewall as a network security system , network information security . Firewalls exist in two types of hardware and software integrated into the system and act as a barrier between secure and unsafe access, preventing unauthorized access and preventing unauthorized access. block viruses ... ensure internal information is safe from bad access.

What is a firewall?

Image: What is a firewall?

Any computer connected to the Internet has a firewall and in a system of networked devices there will be a firewall to manage inbound and outbound access in a network.

Typically they monitor devices based on IP address - Internet Protocol Address.

>> See more: Types of Cisco Firewall

What is the role of a firewall?
Firewalls help control the flow of information between the Intranet and the Internet, they detect and judge the acts of being accessed and not being accessed inside the system, ensuring maximum information security.

The main feature of this device can be summarized in the bullet points below:

- Enable or disable outbound access services, ensuring information only in the intranet.

- Enable or disable external services access in.

- Detect and prevent attacks from outside.

- Support access control (you can set ban or allow).

- Control access of users.

- Managing and controlling data flows on the network.

- Administrators can know who is trying to access the network.

- Firewall acts as an intermediary proxy.

- Protect system resources by security threats.

- Load balancing: You can use multiple internet connection at the same time, the sharing of transmission will help the internet connection much more stable.

More info: cisco enterprise firewalls