A firewall is a filter that sits between your computer and the Internet. It stops files flowing in either direction if they are perceived to be a threat, but users typically focus on stopping the flow inbound. For example, your firewall should stop potential viruses from downloading onto your computer. You can set up a firewall as an appliance on your system or through a dedicated computer, which normally runs Linux.
Linux comes with a built-in firewall, but it needs to be activated. Many people believe that they are safe enough without one because, most times, the operating system does not have any open ports through which a criminal can gain access. However, it is still best practice to use the firewall configured correctly for your system.
Your Linux System is Vulnerable to These Attacks Even with a Firewall in Place
As previously mentioned, Linux systems are vulnerable to certain attacks, even if the firewall is set up and configured correctly. We will explore these attacks in more detail below.
Sensitive Data Exposure
Sensitive data (passwords etc.) should be encrypted. If it is not, then it can be compromised in a cyberattack, either when stored or in transit. This can allow unauthorized access to systems and data such as bank accounts or customer data, which cybercriminals can use to steal money or sell personal information, potentially leading to lost client trust for businesses. Data should only be stored when absolutely necessary, and you should always encrypt it with secure
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