The article covers various methods of strengthening security of your Linux hosting servers. It’s a concise collated list with references to detailed articles sprinkled all across our websites.
This should prove helpful for beginners as well as experienced server administrators by referring to the different ways of hardening security for a Linux Server.
A Firewall plays a crucial role in securing a server. Nearly fifty percent of the total vulnerabilities can be avoided by simply installing either a CSF or APF firewall.
Please refer the following articles to learn the steps involved in installing CSF and APF Firewalls :
Quite frequently we hear about news about increasing number of attacks on SSH. Its pretty ofter that we find people concerned about different bots trying to access a server via. port 22 with multiple login attempts to breach into the system. Inorder to avoid someone to get into your server, you can secure your server using SSH.
You can refer the procedure to Secure your server using SSH
An enabled Telnet may pose a major threat to the servers, disabling it can close the loop hole and protect the servers from any possible damage.
Please refer the following articles to learn the steps to Disable it on the server.
One of the widely used scripting languages for apache and mysql is PHP. Being a known fact attracts lot of hackers and fraudsters with exploring and using the vulnerabilities. By disabling the system level functions in the php configuration files, users can protect their servers.
Learn more about PHP Security
This is one of the common areas that are often overlooked by inexperienced webmasters. Recursive DNS lookups can be performed if you are running bind. Disallowing it on your servers would not only keep it in the best health but also protect it from vulnerabilities.
SQL injections and local file inclusion attacks are frequent these days, using ModSecurity an open source web application firewall can help you protect your server against these known security vulnerabilities. Refer the following list of articles to learn the method to install mod_security on your linux server.
ModEvasive module for apache is one of the popular modules to help protect against DDOS (denial of service attacks).
Rkhunter is a very useful tool that is used to check for trojans, rootkits, backdoors, and other security vulnerabilities. This is one of the proven methods to enhance server security.
Learn how to install RkHunter in the following articles
Clam AntiVirus or ClamAV is a free open source, cross-platform antivirus software tool-kit with the ability to scan various types of malicious software, including viruses.
Following article should help you learn the steps to install ClamAV on your server
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