Four Common Mistakes in network security

On the Internet, many machines accidentally leave a "backdoor" in the machine and system due to poor online security settings, which is equivalent to opening the door for intruders. If intruders find security vulnerabilities in your settings, they will launch attacks on you. The results may not affect much, such as reducing your speed or causing your machine to crash. It may also be very serious, such as opening your confidential files, stealing passwords and credit card passwords. However, many people disagree, because they still have four misunderstandings about network security.
Misunderstanding 1: I am not connected to other networks, so it is safe. An independent machine that can access the internet. Compared with a machine in a commercial network center, some or even all of the network protocols used are the same, A commercial network center machine may also have a public firewall or dedicated security personnel. In a strong contrast, some personal machines used for home, office, and small companies are open portals without the ability to prevent intruders. This kind of threat is very realistic: If you use Cable Modem or DSL to connect to the Internet, and it takes a long time on the Internet, in a day, two or four mean intruders may attempt to attack you.

Misunderstanding 2: I use Dial-Up to access the Internet, so it is safe. Each time you start to dial up the Internet, the IP address you use will be different, that is, the dynamic IP address, so compared with the static IP users, intruders are indeed difficult to find you, however, intrusion software has developed to scan tens of thousands of IP addresses one by one within one hour. As long as intruders use these tools, even dial-up Internet users may be attacked.

Misunderstanding 3: I use anti-virus software, so it is safe. A good virus software is indeed an essential part of online security, but it is also a small part. It can protect you by detecting viruses and similar problems, but they are powerless to guard against intruders and malicious legal programs.

Misunderstanding 4: I use the firewall, so it is safe. Firewall is very useful, but if your machine always uses some insecure methods to receive and send data, and you only rely on some additional programs to provide security, this means putting all the eggs in one basket. Once the firewall software has bugs or vulnerabilities, you are very dangerous. In addition, the firewall has no defense capabilities for software such as viruses, especially those programs that send or extract data to or from your machines maliciously. Finally, some firewall software may be helpful, because their vendors have widely introduced the features of their products in the advertisement, which may lead to attacks targeting their vulnerabilities.