In addition to antivirus software, computer why you need a firewall - antivirus software, office sof

In addition to antivirus software, computer why you need a firewall - antivirus software

, office sof

Many of my friends that as long as anti-virus software installed, the system is absolutely safe, this idea is never wise! In today's network security environment, Trojans, viruses wreak havoc, hackers frequently, and all kinds of rogue software, spyware PROFESSIONAL MORALS also made waves. How can we make our system stand so sinister network the environment? Rely on antivirus software enough to ensure our systems safe? Now I safe from the impact of several aspects of the system to analyze the importance of the firewall. Current network security threats mainly from virus attacks, Trojan attacks, hacker attacks and spyware attacks. Now viruses, Trojan update soon, from the global point of view, the virus can cause large losses Trojans, most of them are new, or all kinds of variants. Firewall can block the virus, Trojan or even Why is the latest variant of the virus trojan then? This from the start with the firewall's defense mechanisms. Firewall is based on the data package to connect to the network monitor, that is, a firewall is equivalent to a strict guard, in charge of the system of the door (port), which is responsible for verification of identity of persons entering and leaving, everyone needs the highest Executive's permission before they can access, and this highest office, is up to you. When an unknown program wants access to the system, or even a network, the firewall will intercept the first time, and check the status, if you leave after clearance (such as settings in the application of the rules to allow a certain program you connect to the network ), then the firewall will release issued by the program all of the data packet, if it detects that the program has not been permitted release, the automatic alarm, and whether to allow this process to issue prompt release, this time you will need the "supreme commander" to do the judgment. Generally speaking, he did not run or do not understand the process, we all stop, and through search engines or firewalls are prompted to confirm the nature of the software. Write to you, we estimated that the difference between antivirus software and firewalls have a certain understanding, and give an intuitive example: your system is like a castle, you are the castle's supreme commander, is responsible for anti-virus software and firewall security The guards, each division of labor. Antivirus software is responsible for identification of persons entering the castle, if the suspicious characters on the arrested and (of course, great chance to get wrong, or not so many false cases of manslaughter); the firewall is the gatekeeper for each people out of the castle to check if the person found not pass on to the Supreme Commander confirmed. Therefore, any Trojan or spyware may be sneaking in under the eyes of anti-virus software, record your account password, but because of the firewall to see the wearer gates, more information is also not be sent out to protect your system security. Also, for hacking, antivirus software is not any way, because the hacker does not have any signature operation, the natural anti-virus software does not recognize, but a firewall can bring your system up to each port are hidden, so that hackers Can not find the entrance, naturally ensure system security.

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