Security Configuration for Linux System Security

As a system administrator, it is very important to perform a comprehensive security check on the system on a regular basis. Recently, some friends wrote that some inexplicable problems have occurred, for example, the biggest problem is that the network service is obviously slow, which is very likely to be attacked.

Practice has proved that the default installation is not safe for any system. In fact, no matter whether you use windows, Linux, bsd, or other systems, there are many vulnerabilities installed by default, so how can we become a secure system? This is exactly what our system administrators need to do. Configure and reconfigure.

As long as you carefully configure any system and block known vulnerabilities, it can be said that the system is secure, not as many friends have said. They have installed the system, configured the firewall, and installed anti-virus software, so it is safe. In fact, if you do not set any security settings for the system, it is equivalent to opening a door to the hacker, which can be fully controlled in tens of minutes!

This is not shocking.

As a Linux system, there are also many vulnerabilities that may be exploited to control your entire system. To prevent these vulnerabilities, we need to take the following steps:

1. Upgrade the latest version of all software packages in the system;

2. Set a strong firewall;

3. Regularly check key record files and configure anti-virus software

4. pay more attention to the websites that issue security information warnings, and master the characteristics of some of the latest viruses and hacker programs, which all benefit from the normal operation of the system.

This article focuses on optimization. In order to cooperate with this topic, we will only discuss some daily maintenance work.

In addition to the four listed above, they are required by administrators and are also important for the maintenance of some Linux system details.

Including:

1. configuring the log training tool and regularly downloading backup logs is a good habit. This not only reduces the disk space consumed by logs, but also improves system efficiency and can detect problems in a timely manner, some good system log analyzer in Linux can directly extract special items in the log, saving the trouble of reading logs;

2. Use commands such as lsof-I, netstat-a, and ps-e to regularly check system service port listening. You can also create a script that is periodically executed, regularly execute these commands and send them to your mailbox;

3. regularly check the history list, last list, And vipw user list of the root user;

4. Regularly Back Up Files and use the tar command to back up the files. Of course, you need to download these backups and transfer the media;

If you find any special situations or ports that you have never seen before, pay enough attention to them.

The security configuration process of Linux has been completed. This is an important step for Linux system security. I hope you can understand it. At the same time, we hope everyone can use Linux safely and efficiently to bring convenience to your work and life.