He Rensi medical book (2)

He Rensi medical book (2)

He Rensi

 

On June 23, July 20, he started to equip my computer with a firewall after installing patches for the operating system again.

He reness said that there are many ways and means for new users to deal with hackers, including a complete patch of the operating system and a complicated password, of course, the most important thing is to have a network firewall capable of cracking all attacks. He Rensi divided the network firewall into two types: one is a pure firewall for defense, and the other is a firewall that can detect the enemy ......

 

Defense

 

Crux: no defense capability

Symptom: the website has been spoofed by a Web thief and cannot be noticed after Trojans are detected.

Solution:

Xuerou suffered from various Trojans that could not be found and killed one after another. It is conceivable that this group of cyber thieves was premeditated. In addition, anti-virus software is usually helpless for viruses that cannot be identified or modified. Because the pattern is like a person's face, once modified, it will be like an orthopedic operation. You may be familiar with this person, and you will not be able to see his real background from the appearance.

It is already quite a matter of practice. The ability to quietly intrude into the computer in the snow soft, more than a master. However, the experts do not necessarily have no rivals. Everything is equipped with their own fatal vulnerabilities, let alone a bloody attack. In fact, it is very easy to deal with such tricks. You can use a defensive firewall to annihilate it in your computer, even if your virus firewall does not notice its face, filters Defensive Network firewalls can also block it.

In my opinion, a filter firewall is characterized by extremely strict management of network access permissions. Any program, even includingIEWhen the browser wants to access and shake hands on the network, it needs to ask about the defensive network firewall. Only after these programs that need to connect to the network are you ready can they be allowed to access the network. This firewall has a benefit. Even if you have dozens of Trojans, even if none of these Trojan antivirus software can be found and killed, you can control the program's access to the network, keep all these Trojans in your computer, so that they cannot be in contact with external masters.

Which of the following are common in China: Skynet firewall and Kingsoft network firewall?

(Figure 1)

However, these firewalls also have fatal vulnerabilities. Because they all focus on passive defenseIDSThe intrusion analysis is not as comfortable as the proactive detection firewall, especially for experts, the resource consumption of such firewalls is also what they do not like.

 

Attack

 

Crux: repeated attacks, slow network speed

Symptom: DueIPFixed reasons such as repeated attacks

Solution:

For experts in the rivers and lakes, especially those who want to have a fixedIPServers and computers are vulnerable to highly targeted vulnerability scanning attacks andDoSFlood attacks. This type of attack is very fierce, just like disaster recovery. wherever it goes, the speed of the network is slowed down, while the system is paralyzed. If you are on a sensitive network