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Introduction Apache HTTP Server and PHP are widely used technologies for hosting dynamic websites and web applications. Installing Apache with PHP through source compilation provides greater control over versions, modules, performance optimization, and custom configurations compared to package-based installations. This method is commonly used in environments where administrators require specific… Continue Reading How to install/compile Apache with PHP via source installation

Introduction DomainKeys Identified Mail (DKIM) is an email authentication mechanism that helps prevent email spoofing and improves email deliverability. It allows a mail server to digitally sign outgoing emails using a private cryptographic key. The corresponding public key is published in the domain’s DNS records, enabling receiving mail servers to… Continue Reading Installing and Configuring DKIM (DomainKeys Identified Mail) with Postfix

Introduction Pure-FTPd is a widely used FTP server in cPanel environments for managing file transfers securely and efficiently. However, administrators may occasionally encounter service restart failures caused by configuration conflicts or unsupported authentication settings. One common error is “421 Unknown authentication method: extauth:/var/run/ftpd.sock”, which prevents Pure-FTPd from starting properly. In… Continue Reading Not able to restart Pure-FTPd: 421 Unknown authentication method: extauth:/var/run/ftpd.sock

Introduction Secure Sockets Layer (SSL), or more accurately TLS (Transport Layer Security), encrypts communication between a user’s browser and your web server. Installing an SSL certificate ensures that data such as login credentials, payment information, and personal details are transmitted securely while also improving user trust and search engine rankings.… Continue Reading Setting Up an SSL Website on CentOS/Ubuntu Without a Control Panel

Introduction Cloudflare is a leading Content Delivery Network (CDN) and security service that improves the speed, reliability, and security of websites. It acts as a reverse proxy between visitors and the web server, caching static content and routing traffic through its global network of data centers. For web hosting providers,… Continue Reading Cloudflare and Its Uses

Introduction A TAR (Tape Archive) file is commonly used on Linux and Unix systems to bundle multiple files into a single archive. There may be situations where you need to search for a specific word or string inside the files contained within a TAR archive without manually extracting the entire… Continue Reading How to Search for a Word Inside a TAR Archive Using a Shell Script

Introduction Roundcube is the webmail application bundled with cPanel for managing email accounts through a web browser. In some environments, administrators may need to verify the installed Roundcube version or perform an upgrade to access new features, bug fixes, or security improvements. Note: Modern versions of cPanel manage Roundcube automatically… Continue Reading How to Find the Roundcube Version Provided by cPanel and Upgrade Roundcube

Introduction When an email cannot be delivered to its intended recipient, the sending mail server generates a bounce message, also known as a Non-Delivery Report (NDR). These messages contain SMTP reply codes or enhanced status codes that indicate why the email delivery failed. ASSP (Anti-Spam SMTP Proxy) and other mail… Continue Reading ASSP and Other Mail Bounce Back Codes

Introduction SORBS (Spam and Open Relay Blocking System) is a DNS-based Realtime Blackhole List (DNSBL) used to identify IP addresses associated with spam activity, open relays, and other unwanted mail sources. By integrating SORBS with Exim, incoming SMTP connections can be checked against the blacklist database before accepting email. If… Continue Reading Configuring Exim with the SORBS RBL Blacklist

Introduction Linux Malware Detect (Maldet or LMD) is an open-source malware scanner designed for Linux servers, especially web hosting environments such as cPanel/WHM. It helps administrators detect malicious files, web shells, backdoors, and other malware that may exist in users’ websites. Maldet can scan specific directories, identify infected files, quarantine… Continue Reading Malware Detect (Maldet) Scanner for cPanel