VPN has become a vital part of our digital lives. Every day, millions of people around the globe use VPNs for various reasons - some are trying to keep their internet connections secure, others are looking to get around blocks that limit which websites they can visit based on where they're located, and still others want to browse the internet without being tracked. But it's important to know that not all VPNs are created equal. One big difference between them is the protocols they use. These protocols are like a set of rules and technologies that determine how your data moves from your device to the VPN server and then to the website you're trying to reach.

In this article, we'll break down the details of different VPN protocols like OpenVPN, WireGuard, and some special cases like Shadowsocks, which isn't a full VPN but gets the job done for most people. We'll cover what these protocols are, why they're important for keeping you safe online, and how to figure out which one is the best fit for your needs. We'll also compare the pros and cons of each one to make your choice easier. Our aim is to give you the practical advice and information you need so you can make a smart decision about which VPN protocol to use.

Linux servers are renowned for their stability, cost-effectiveness, and open-source nature. However, ensuring security is of utmost importance due to ever-evolving cyber threats and attacks. This guide presents an ultimate Linux server security checklist that covers essential steps to harden and secure a Linux server, providing explanations on the importance of each step and how it helps maintain system integrity and safeguard valuable data. We encourage you to use this checklist as a reference for achieving ultimate security on their Linux servers. The steps are sorted from most important to least important.