On a cPanel server, use AutoSSL: in WHM open SSL/TLS > Manage AutoSSL, choose a provider, and run it for all users. Certificates install and renew on their own. On a server without a control panel, install Certbot and run sudo certbot --nginx or sudo certbot --apache. Certbot sets up automatic renewal. Check renewal with sudo certbot renew --dry-run.
Protect your server from malware and viruses by installing ClamAV on WHM. Follow this guide to install, update, and scan your system for threats.
Linux Malware Detect (LMD) is an open-source malware scanner for Linux systems, specifically designed for shared hosting environments. It leverages real-time threat intelligence from network intrusion detection systems and community submissions to identify and eliminate malware. LMD integrates seamlessly with ClamAV to enhance scanning capabilities using both MD5 hash-based and HEX pattern matching detection techniques.
Install rkhunter from your distribution's packages (dnf install rkhunter from EPEL on AlmaLinux, Rocky Linux and CloudLinux, or apt install rkhunter on Debian and Ubuntu). Then update its data files with rkhunter --update, record a baseline of your system files with rkhunter --propupd, and scan with rkhunter --check --sk. Set an email address for warnings and let the daily cron job run. Run --propupd again after every system update, or you will get false warnings.
ConfigServer Security & Firewall (CSF) is a popular firewall for Linux servers that includes a login failure daemon (lfd) to detect and block brute-force attacks. This guide will walk you through installing and configuring CSF on your server.
The IP Deny Manager in cPanel allows you to block specific IP addresses, domains, or entire IP ranges from accessing your website. This feature is useful for preventing malicious visitors, spam attacks, and unauthorized access.
Protect your server from DDoS attacks with DDoS-Deflate. Learn how to install, configure, and optimize this simple yet powerful bash script for automated IP blacklisting using iptables or APF.
Practical, real-world articles on offshore hosting, Linux and cPanel administration, server security and the technology behind our network, written by the UnderHost team.
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