net security classroom
prevent network attacks
Little knowledge
attacks from the Internet never stopped—
Melissa virus incident in the spring of 1998, CIH virus incident in the summer of 1998, 1999 The Love Warm virus incident in 2004, the Panda Incense Burning Virus incident in 2007, the ransomware incident in 2017...
What is a cyber attack?
Cyber Attacks
Cyber Attacks (Cyber Attacks, also known as cyber attacks), refer to any type of offensive action targeting computer information systems, infrastructure, computer networks or personal computer equipment.
For computers and computer networks, destroying, exposing, modifying, causing software or services to lose functionality, stealing or accessing data from any computer without authorization will be considered an attack in computers and computer networks.
Common cyber attack methods
1. Password intrusion: Criminals illegally log in to your account and then carry out attack activities.
2. Trojan horse : The bad guy puts a "bait" and waits for you to download, install, and run, and then your account will have no secrets.
3.WWW Deception: You want to visit website A. After the bad guy tampered with it, you actually visited the bad guy's website B, and then you can do whatever you want to cheat you.
4. Email Attack : Criminals keep sending spam to your email address, paralyzing the system, and then they can do bad things.
5. Node attack: After the criminal attacks and controls your computer, he attacks and controls other important websites. After investigation, you can only be found here, and your computer becomes commonly known as broiler and zombie machine.
6. Network monitoring: In the same network segment, criminals can receive all the transmitted information after turning on a certain working mode.
7. Hacking software: Criminals can illegally obtain the ultimate user-level rights of the user's computer and give full control over it. In addition to performing file operations, they can also perform desktop capture pictures, obtain passwords, etc.
8. Security vulnerabilities: Many systems have security vulnerabilities (bugs). For example, our commonly used Windows operating systems often need to be patched to make up for the security vulnerabilities that occur. If these vulnerabilities are not repaired, they will be exploited by bad people and obtain your computer permissions and even the information data in the computer.
9. Port scan : In this way, the bad guy can know whether the port of your computer is in an activated state, which services the host provides, whether the service is provided contains certain defects, etc. It is often the prelude to launching further attacks.
At first glance, cyber attack methods are dazzling and unpredictable. In fact, it is through a series of technical operations to achieve the purpose of control, stealing and destruction.
So, how should we prevent cyber attacks?
For individuals -
1. The password is no less than 8 digits and should contain numbers, letters, symbols, and no complete vocabulary, username, name, birthday, etc.
2. Install antivirus software and check and kill regularly.
3. Apply system patches in time.
4. Install software downloaded by regular channels, and software of unknown origin will not be installed.
5. Do not browse irregular websites
For units and enterprises —
1. Strengthen internal security awareness training, strengthen network security prevention awareness, and keep a good network security barrier from the source.
2. We will continue to do basic prevention, security risk assessment and regular inspections, formulate network security systems and emergency plans and , and improve emergency response capabilities.
3. Strengthen the management and control of servers, network security equipment, , computer room and other facilities, timely and accurately fill in the new equipment, maintenance and change configuration record tables, and regularly modify the server password.
4. Optimize network security policies, equip professional firewalls, perform operation monitoring, traffic monitoring and threat monitoring of internal networks, and generate network security logs.
5. Regularly detect software, computer firewalls and antivirus software, update and upgrade in a timely manner, fix existing vulnerabilities, backup databases in a timely manner, and strengthen the management of computer external equipment.
Source: Cybersecurity Bureau of the Ministry of Public Security
