October 3, 2019
October 3, 2019
Do you want to protect your Linux VPS or server from dangerous malware and viruses? You can easily do that by installing an antivirus. There are plenty of options out there, but we do recommend to install ClamAV. It’s a great open-source antivirus solution against trojans, malware, and other security threats.
In this article, you will learn how to install ClamAV on CentOS 7 for better server protection!
While Linux is known to be one of the more secure operating systems, that doesn’t mean it is impenetrable to virus attacks. One study has shown that 36% of total top malware cases in Q1 2017 were reported on Linux systems. What’s worse, is that these numbers are not going down.
It also states that 82% of the attacks target webservers. That’s more than enough to alert anyone about their VPS and server security. Therefore, you need an antivirus to give your system better online protection.
Thankfully, we have ClamAV, one of the best Linux security solutions to get rid of numerous malware threats. It’s reliable, easy to set up, and free. Just keep in mind that this guide will show you how to install ClamAV on CentOS 7 distribution.
Before we begin, make sure that you have root access to your CentOS 7 server or VPS. For Hostinger users, the required credential can be found on the Servers tab in hPanel.
Additionally, you need to know how to use Putty (Windows) or Terminal (macOS, Linux) to establish the SSH connection.
We’ll divide this tutorial into three steps – installing ClamAV on CentOS 7, configuring SELinux, and configuring ClamAV. So, let’s get started!
sudo yum -y install epel-release
sudo yum clean all
sudo yum -y install clamav-server clamav-data clamav-update clamav-filesystem clamav clamav-scanner-systemd clamav-devel clamav-lib clamav-server-systemd
You have installed ClamAV, but we still need to make several additional configurations to make it work properly.
SELinux is a security measure aimed at protecting changes to some files. Additional configuration is required if you want to use ClamAV with enabled SELinux kernel module. Otherwise, ClamAV will not be able to read certain sections of your files.
sudo setsebool -P antivirus_can_scan_system 1
sudo setsebool -P clamd_use_jit 1
sudo getsebool -a | grep antivirus
You should get this result:
antivirus_can_scan_system --> on antivirus_use_jit --> off
Once ClamAV is ready to run alongside SELinux, it is time to configure the antivirus.
sudo sed -i -e "s/^Example/#Example/" /etc/clamd.d/scan.conf
sudo yum install nano -y
Next, open the configuration file:
sudo nano /etc/clamd.d/scan.conf
Find the following line:
Remove the # symbol and save your changes.
sudo sed -i -e "s/^Example/#Example/" /etc/freshclam.conf
You should get a similar output:
ClamAV update process started at Tue Dec 19 09:30:20 2016 main.cvd is up to date (version: 57, sigs: 4218790, f-level: 60, builder: amishhammer) Trying host database.clamav.net (220.127.116.11)... Downloading daily.cvd [100%] daily.cvd updated (version: 22739, sigs: 1100989, f-level: 63, builder: neo) Downloading bytecode-279.cdiff [100%] Downloading bytecode-280.cdiff [100%] Downloading bytecode-281.cdiff [100%] Downloading bytecode-282.cdiff [100%] Downloading bytecode-283.cdiff [100%] bytecode.cld updated (version: 285, sigs: 57, f-level: 63, builder: bbaker) Database updated (5319836 signatures) from database.clamav.net (IP: 18.104.22.168)
sudo systemctl start clamd@scan
sudo systemctl enable clamd@scan
Viruses can harm computers and even web servers at any given time, regardless of what operating system you’re using. Therefore, if you own a Linux VPS or a server, you must install an antivirus to protect it from malicious attacks.
You’ve learned how to install ClamAV on CentOS 7 using the command line. Let’s review the steps once more:
That’s it! Feel free to leave a comment below if you have any questions.
May 29 2019
great HowTo, thx for your excellent work