--- title: "Apache Web Server" source: "https://docs.nexcess.com/hosting/server-administration/linux/apache-web-server/" description: "Our collection of articles provides technical guides for installing, configuring, and managing the Apache web server on Linux operating systems." vertical: "Hosting" date: "2025-07-31" last_modified: "2026-07-02" --- # Apache Web Server The Apache HTTP Server is the backbone of countless websites worldwide, known for its incredible flexibility, modular architecture, and rock-solid reliability. However, with that power comes a variety of configuration files, modules, and command-line tools to master. Whether you are spinning up your first web server, configuring virtual hosts to serve multiple domains, or fine-tuning performance for a high-traffic application, this collection of technical guides is here to help you manage Apache on your Linux operating system with confidence. **Explore the guides below to learn how to:** - **Troubleshoot Server Errors:** Learn how to read Apache error logs, diagnose failed requests, and fix common misconfigurations quickly. - **Install and Configure:** Get Apache up and running on your server and learn the basics of setting up virtual hosts and directory permissions. - **Manage Modules:** Leverage Apache’s modular architecture by learning how to enable, disable, and customize features as your application needs evolve. - **Optimize and Secure:** Protect your web traffic by configuring SSL/TLS certificates (HTTPS), setting up authentication, and tweaking performance thresholds. --- Apache Web Server Articles 13 results This collection of articles provides technical guides for installing, configuring, and managing the Apache web server on Linux operating systems. - ## [Adding a Sender Policy Framework (SPF) Record](https://docs.nexcess.com/hosting/email/spam/adding-a-sender-policy-framework-spf-record/) SPF records list authorized email servers for your domain, preventing email spoofing by spammers who mimic your server to deceive recipients and evade spam filters. [Read more: Adding a Sender Policy Framework (SPF) Record](https://docs.nexcess.com/hosting/email/spam/adding-a-sender-policy-framework-spf-record/) - ## [Adding Custom RBLs](https://docs.nexcess.com/hosting/email/spam/adding-custom-rbls/) Minimize spam by adding custom RBLs in WHM or Plesk. Learn how to add, enable, and test new remote block lists on your server. [Read more: Adding Custom RBLs](https://docs.nexcess.com/hosting/email/spam/adding-custom-rbls/) - ## [Email Authentication — How to Check SPF Records and DKIM Records](https://docs.nexcess.com/hosting/email/spam/check-spf-records/) Knowing the configuration options used to check SPF records and DKIM records is important for setting up email authentication. Let’s review them in the context of Liquid Web systems. [Read more: Email Authentication — How to Check SPF Records and DKIM Records](https://docs.nexcess.com/hosting/email/spam/check-spf-records/) - ## [Enabling DMARC](https://docs.nexcess.com/hosting/email/spam/enabling-dmarc/) DMARC (Domain-Based Message Authentication, Reporting, and Conformance) DNS record enhances email security by enforcing DKIM and SPF checks, specifying actions for failed checks. [Read more: Enabling DMARC](https://docs.nexcess.com/hosting/email/spam/enabling-dmarc/) - ## [Enabling SpamAssassin for Spam Filtering](https://docs.nexcess.com/hosting/email/spam/enabling-spamassassin-for-spam-filtering/) Reduce inbox spam by enabling SpamAssassin in cPanel or Plesk. Learn how to configure scoring thresholds, auto-delete, blacklists, and more. [Read more: Enabling SpamAssassin for Spam Filtering](https://docs.nexcess.com/hosting/email/spam/enabling-spamassassin-for-spam-filtering/) - ## [Filtering Spam Using RBLs](https://docs.nexcess.com/hosting/email/spam/filtering-spam-using-rbls/) Block incoming spam at the server level using Remote Block Lists (RBLs). Learn how to enable and configure RBL spam filtering in WHM and Plesk. [Read more: Filtering Spam Using RBLs](https://docs.nexcess.com/hosting/email/spam/filtering-spam-using-rbls/) - ## [How to set up DMARC for your domain](https://docs.nexcess.com/hosting/email/spam/how-to-set-up-dmarc-for-your-domain/) Learn how to set up DMARC, DKIM, and SPF to ensure that your outgoing email can authenticated and not be spoofed, taking an active role in protecting your online reputation. [Read more: How to set up DMARC for your domain](https://docs.nexcess.com/hosting/email/spam/how-to-set-up-dmarc-for-your-domain/) - ## [RBL Failure: error open resolver](https://docs.nexcess.com/hosting/email/spam/rbl-failure-error-open-resolver/) Using RBLs helps reduce spam, but a public DNS resolver may block emails. Use a private resolver to fix it. [Read more: RBL Failure: error open resolver](https://docs.nexcess.com/hosting/email/spam/rbl-failure-error-open-resolver/) 1[2](?query-0-page=2) [Next Page](/hosting/server-administration/linux/apache-web-server?query-0-page=2)