Author: Hitesh Jethva

Apache is free, open-source, and the most widely used web server around the world. It is not only known for its power, but also its multiple components with specific functions. Apache Virtual Host is one such component; it allows us to host multiple websites on a single server.

If you have one big server with extensive resources like lots of HDD space, RAM, and CPU power, then you can host multiple websites using virtual hosting. You can host an unlimited number of websites on your Apache webserver. Make sure your server has enough resources to handle the traffic and disc space requirements. One of the best examples is a web hosting provider that uses virtual hosting to host hundreds and thousands of websites on a single server.

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Adding an additional IP is routine for any system administrator. When you set up a new server, it will have a single IP address linked with the server hostname. There are several reasons you might need to set up an additional IP address on your system. Some of them are listed below:

• To set up Internet sharing with Squid proxy server.
• To run the same service multiple times.
• To use different hostnames in reverse DNS lookups.
• To avoid being blacklisted in spam filters.
• To host multiple SSL sites.

Ubuntu allows you to add multiple virtual IP addresses on a single network interface card without buying an additional network adapter.

In this tutorial, we will explain how to add an additional IP address on an Ubuntu 18.04 server.

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iRedMail is a free, open-source and full-featured mail server solution that allows you to host your own mail server at no cost. iRedMail is a script that automatically installs and configures all necessary mail server components on your server, saving you lots of time. You can create unlimited mailboxes and unlimited mail domains through iRedMail’s web-based interface.

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Apache and Nginx are free, open-source and popular – the most widely used web servers around the world. Apache and Nginx both run on all Unix-based operating systems. Apache is known for its power, while Nginx is known for its speed. Nginx also used as a reverse proxy for the HTTP, HTTPS, IMAP, SMTP, POP3 and as a load balancer.

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UFW, also known as Uncomplicated Firewall, is a Linux-based tool for managing firewalls. It uses a command-line interface and is specially designed to be easy to use. UFW is a frontend for iptables and provides a framework for managing netfilter.

UFW is an alternate tool for iptables that simplifies the process of configuring a firewall. While iptables is a very good and flexible tool, but it can be difficult for beginners to learn how to use it to properly configure a firewall.

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LAMP is a free and open-source web development platform used to host dynamic and high-performance websites. It consists of four open-source components: Linux, Apache, MySQL/MariaDB, and PHP. LAMP uses Linux as the operating system, Apache for webserver, MySQL/MariaDB as a database and PHP as the scripting language.

In this tutorial, we will explain how to install LAMP and secure it with Let’s Encrypt free SSL on Ubuntu 18.04.

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iRedMail is a free, open-source and full-featured mail server solution that allows you to host your own mail server at no cost at all. iRedMail is a script that automatically installs and configures all necessary mail server components on your server, saving time. You can create unlimited mailboxes and unlimited mail domains using iRedMail’s web-based interface. If you are looking for a free and fully-fledged mail server solution without any headaches, then iRedMail is best choice for you. All components used in iRedMail are open source, including Postfix, Dovecot, Nginx, MariaDB, SpamAssassin, ClamAV, SOGo, Fail2ban, Roundcube and Netdata. You won’t need to pay any extra costs.

In this tutorial, we will learn how to install and configure an iRedMail server on Centos 7 VPS.

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Memcached is a free, high-performance and distributed memory object caching system written in C language. It is used for speeding up dynamic database-driven websites by caching data and objects in RAM. Memcached works by storing the content of the website database table and query in the memory, increasing website performance drastically. You can create and deploy a highly scalable and high-performance website with Memcached. Memcached is now used by many companies including Facebook, Reddit, Wikipedia, Craigslist, Yellowbot, YouTube and more.

In this tutorial, we will explain step-by-step instruction on how to install and secure Memcache on Ubuntu 18.04 VPS.

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There are several reasons you want to use multiple versions of PHP with Nginx on your server. If you have two applications, one application which runs on PHP 7.0 and a second application which runs on PHP 7.2, then you must use multiple PHP versions on your server. You can also use a separate server for each PHP version, but it will increase your hosting cost. Installing multiple versions of PHP with Nginx is the best choice to reduce hosting cost.

In this tutorial, we will install multiple versions of PHP and configure Nginx to work with both versions of PHP.

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Apache and Nginx are free, open-source and the most widely used web servers in the world. Apache is the number one server, while Nginx comes in the second place. Apache is known for its power and the backend compatibility while Nginx is known for its speed. Nginx provides a rich set of features including load balancing, security, and acceleration. Using Nginx as a reverse proxy allows you to use these features for any web application.

Configuring a reverse proxy helps you to hide the identity of your backend servers and protect your servers from attacks. A reverse proxy also performs load balancing and distributes client request across backend servers. This can very helpful when some servers become overloaded due to a sudden spike in client requests.

Using Nginx as a reverse proxy for Apache will allow both servers to work together and allow you to take advantage of the benefits of both servers. You can easily monitor what traffic goes in and out through the reverse proxy.

In this tutorial, we will learn how to install and configure Nginx as a reverse proxy for Apache on Ubuntu 18.04 VPS. We will configure Apache to run on port 8080, configure Nginx to run on port 80, and forward client requests coming on port 80 to the Apache webserver.

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