15/09/2023 | Tuyết Hồng

Recently on the Internet, we have witnessed an alarming increase in intrusive and cyber attack activities. The explosion of large-scale cyber attacks has elevated the issue of computer security to greater importance than ever before. One of the most critical tools to shield your system from these threats is a firewall. A firewall is not just a mere barrier; it stands as a robust wall between your computer and the digital world. Join us as we delve deeper into the critical role and functioning of firewalls in the article below.

Introduction to Firewalls

What is a Firewall?

In the digital age, cyber threats are no longer a concern solely for large organizations; they affect every computer user. One of the most vital solutions to safeguard information in a networked environment is a “Firewall” or, as known in English, the “Firewall”.

Being a complex system, based on hardware, software, or a combination of both, a firewall acts as the first defense against threats from the online world. It controls incoming and outgoing traffic, ensuring only safe and trustworthy data packets are allowed through.

For a cybersecurity expert, a firewall is not just a protection mechanism. It’s the soul of the security system, responsible for blocking, routing, and even guiding data packets. Whenever a threat attempts to infiltrate, the firewall responds swiftly, stopping it at the door and reporting to the network administrator.

Looking deeper, understanding the operating principles of a firewall and how it’s configured is an art. Through this, we can customize access levels, creating a secure and trustworthy environment for our network.


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Types of Firewalls

In the realm of network security, we differentiate between two main types of firewalls: “Personal Firewall” and “Network Firewall.” Below, we’ll explore the features and operations of each to better understand how they protect our network and data.

Personal Firewall

This type of firewall is primarily developed to ensure security for an individual computer against threats from the online environment. It not only blocks unauthorized access from the outside but also closely monitors and controls the operation of applications within the system.

Integrated into many operating systems and security software, these services include Microsoft Internet connection firewall, Symantec personal firewall, Cisco Security Agent, to name a few. For those wishing to protect their individual computer, choosing a personal firewall is the ideal solution.

Network Firewall

In contrast to personal firewalls, network firewalls are designed to protect a comprehensive computer network, encompassing various workstations. They act as a protective threshold, preventing unwanted infiltrations and safeguarding an organization’s valuable data.

Based on a physical or software structure, renowned products include Cisco PIX, Nokia firewalls, Juniper NetScreen firewall, and various solutions based on Linux or Microsoft ISA Server.

Quick and Simple Guide to Bypassing Firewalls

If you want to access certain restricted online content or services due to firewalls WARP, using a VPN solution is effective. Below is a detailed guide on activating CloudFlare WARP+ VPN through the APK Combo app.

Step 1: Install the app

Firstly, you must download and install the app from WARP. Ensure you download the exact version of the app from a trustworthy source.

Step 2: Activate VPN

After launching the app, search for and click on “Active CloudFlare WARP+ VPN”. You’ll know the VPN is successfully activated when the status shows “Active” accompanied by a green checkmark.


Step 3: Confirm activation

Next, select the “Active” option to ensure the VPN is activated and functioning correctly.


Step 4: Check the VPN connection

Finally, press “Check VPN” to verify that you’re successfully connected and using the VPN.


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