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Loading ...The Internet is an environment that cannot secure itself and the users connected to it. Due to the growth in Internet usage, the variety of security threats has increased. Wider range of risks and threats are possible to a computer which is connected to the Internet. These threats could be broadly classified as malware threats, privacy exposure, unsolicited communication, irrelevant content, impersonating and hacking. These are grounded by Viruses, spywares, worms, Trojans, hackers and adwares. Firewall is a tool, either could be a hardware or software, that runs between the system and global network to filter the information in the perspective of protecting from most common threats.
Well known threats and how the firewall can prevent or fix them are discussed below
Well known Internet security threats are virus attacks, malicious code and exploits, identity theft, hacking and spoofing. Some viruses can damage the programs or rewrite the code to make the program unusable. They can spread through the network quickly and could not be understood until the damage is detected. Likewise, other malware such as Trojans, worms, adwares and spywares are follow the same way to break in to a system which is connected to the Internet. Hacking is another type of risk where the hacker gain the access of the user computer and attacks other computer from here. Hackers are using the Internet to intrude into the system. Another significant threat is unsolicited content such as phishing and spam emails. Phishing threats are illegal emails which show themselves as legitimate and demands users private and sensitive data.
When a computer is infected by malicious code, which is coming through the Internet can lose valuable data, corrupt it’s applications and software, expose identity to unauthorized parties and start malfunctioning. Absolutely the system may become unusable and unsecured due to these infection. Further the computer could be identified as a potential unsafe device when the outgoing traffic is not monitored.
Firewall is software or hardware that filters the information transferred through the Internet into the personal system. Firewall can block malware which seeks weakpoints and vulnerabilities for breaking into your system. Firewalls could be generally classified as native firewall, third party firewall, hardware firewall and Internet security personal firewalls. Native firewalls are usually distributed with operating systems such as Windows XP, Windows Vista or Windows 7. These are specific to the operating system and protects from all kind of basic attacks. Third party firewalls are blocking both incoming and outgoing threats by differentiating legitimate software and potential threats. They build a white list from the vendors identification and use common rules for filtering two way communication. Hardware firewall is similar to the software firewall but they are boxed into a device and connected between the Internet connectivity device such as modem and user system. Advantage of the hardware firewall is, it does not affect much the performance of the system. Firewall uses packet filtering, application level filtering and state-ful services to filter and monitor incoming and outgoing data. Therefore most of the vulnerabilities such as malware threats and hacking can be reduced by a properly configured firewall.
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