How to configure your CentOS system to protect against malware and viruses

How to configure CentOS system to prevent the intrusion of malware and viruses

Introduction:
In today's digital era, computers and the Internet have become an indispensable part of people's daily lives. However, with the popularization of the Internet and the continuous advancement of computer technology, network security problems have become increasingly serious. The intrusion of malware and viruses poses a great threat to the security of our personal information and the stability of our computer systems. In order to better protect our computer systems from malware and viruses, this article will introduce how to configure the CentOS system to improve system security.

Part 1: Update the system and install basic tools

1. Update the system
   When using the CentOS system, we must first ensure that our system is up to date and has the latest installed security patches. You can use the following command to update the system:

sudo yum update

2. Install basic tools
   In order to better manage our system and configure security, we need to install some basic tools. We can install these tools using the following command:

sudo yum install -y net-tools wget curl vim

Part 2: Configuring the Firewall

The firewall is the first line of defense to protect our computer system. The built-in firewall tool of CentOS system is firewalld. We can use the following commands to configure the firewall:

1. Start the firewall and set it to start at boot:

sudo systemctl start firewalld
sudo systemctl enable firewalld

2. View the firewall status:

sudo firewall-cmd --state

3. Add firewall rules to allow only necessary network ports to pass:

sudo firewall-cmd --permanent --add-port=22/tcp   # 允许SSH通过
sudo firewall-cmd --permanent --add-port=80/tcp   # 允许HTTP通过
sudo firewall-cmd --reload   # 重新加载防火墙配置

Part 3: Install and configure anti-virus software

Anti-virus software protects our computer systems Another important component. We can choose different antivirus software to provide real-time protection and virus scanning for our CentOS system. Here we take ClamAV as an example to introduce.

1. Install ClamAV:

sudo yum install -y epel-release
sudo yum install -y clamav clamav-update clamav-scanner-systemd clamav-server-systemd

2. Update virus database and configure regular scans:

sudo freshclam   # 更新病毒库
sudo systemctl start clamav-freshclam   # 启动定期更新病毒库任务
sudo systemctl enable clamav-freshclam   # 设置定期更新病毒库任务开机启动

sudo systemctl start clamav-daemon   # 启动ClamAV守护进程
sudo systemctl enable clamav-daemon   # 设置ClamAV守护进程开机启动

Part 4: Configure SELinux

SELinux (Security Enhanced Linux) is a security module in the CentOS system that can provide stricter access control and security protection. We can use the following command to configure SELinux:

1. View SELinux status:

getenforce

2. Modify the SELinux configuration file:

sudo vim /etc/selinux/config

Change SELINUX=enforcing to SELINUX=permissive, save and exit.

3. Restart the system to take effect:

sudo reboot

Summary:
By updating the system, installing basic tools, configuring the firewall, installing and configuring anti-virus software, and configuring SELinux, we It can strengthen the security of CentOS system, thereby improving the stability and information security of our computer system. Of course, the above are just some basic configuration methods. We also need to keep aware of the latest security vulnerabilities, update and upgrade the system in a timely manner to respond to changing security threats, and use the Internet and computer resources rationally to develop good security awareness and Habit.

The above is the detailed content of How to configure your CentOS system to protect against malware and viruses. For more information, please follow other related articles on the PHP Chinese website!