David Filipov - AlphaVPS Blog

Blocking SYN attacks with iptables and SYN cookies

SYN flood attacks can wreak havoc on your server’s resources, potentially crippling its ability to respond to legitimate traffic. Safeguarding against such attacks is crucial for sites that are publicly accessible and want to achieve high uptime. But don’t worry—by the end of this blog, you’ll

How to install NetBird, a self-hosted overlay network

NetBird is an open-source platform that uses multiple open-source technologies to provide a reliable and secure overlay network. What differentiates NetBird from a traditional VPN is that, instead of all the traffic passing through a single point, a direct point-to-point connection is established. This allows increased network performance as the

How to self-host DeepSeekR1 on a Dedicated Server

With the release of their R1 model, DeepSeek disrupted the AI market. Being open-source, much more efficient, and self-hostable you might want to try it out for yourself. Self-hosing an AI model provides some unique advantages like privacy, customizability, and ease of integration however it also comes with its disadvantages.

What are VLANs and what are the benefits of having your server in a private VLAN?

You might have stumbled on the term "VLAN" while looking over dedicated server offerings from different hosting providers. But what does that mean and how does it affect you as a customer? We are going to get all that cleared up in this blog post! What are VLANs

Missing storage space?

Have you ever ran out of storage only to find out that you should have more space available you? Your output of df -h might have looked something like this. Filesystem Size Used Avail Use% Mounted on udev 956M 0 965M 0% /dev tmpfs 197M 428K 197M 1% /run /dev/

Understanding IPv4 Subnetting

Internet Protocol version 4 or IPv4 was developed all the way back in 1981 and even though it's gradually being replaced by IPv6 it still plays a major role in networking worldwide. IPv4 uses a 32-bit address space which is equal to 4,294,967,296 unique addresses.

Linux Tutorials

Setting up redirects using .htaccess files

Htaccess or Hypertext Access is a configuration file that is used to set per-directory settings on apache-based web servers. While .htaccess can be used for a lot of different server configurations in this guide, we will go over how to use .htaccess files to configure redirects for your website and

Linux Tutorials

Working with RAR files under Linux

RAR, an acronym for Roshal Archive is a popular program used for compressing files for easier storage and transportation over the network. RAR is a proprietary compression format and while Linux distributions don’t come with built-in support for RAR, you can easily install utilities like rar to extract or

Linux Tutorials

Troubleshooting full disk space on Linux

If you have limited storage space and don't check up regularly on your on your files your OS can quickly run out of storage. This will manifest as all kinds of errors and be a general headache. In this blog, we will let you know how to quickly

Linux Tutorials

Working with gzip under Linux

Gzip which stands for "GNU zip" is a file compression tool used to reduce the size of files, making them easier and faster to transfer over networks or devices. Gzip is commonly used in Unix-based systems but is supported across many platforms. It is especially popular for compressing

Linux Tutorials

Working with .tar and .tar.gz files under Linux

Tar, which is actually derived from 'Tape Archive', is a program that combines multiple files into a single file or "archive" for easy storage. It's most often combined with gzip to compress the tar archive thus creating a .tar.gz file. In this blog,

Linux Tutorials

Installing Crowdsec IDS on a VPS and configuring it

CrowdSec is an open-source security tool that functions as an Intrusion Detection System (IDS) and Intrusion Prevention System (IPS). It detects and prevents malicious activities on servers and applications by analyzing incoming traffic and behaviors. CrowdSec uses predefined collections and scenarios to identify patterns of attacks, such as brute force

How to install Caddy web server on Ubuntu 22.04

Caddy API Calls API Call Description /config Retrieve the current Caddy configuration. /load Load a new configuration into Caddy (does not activate it). /validate Validate the configuration for errors without loading it. /reload Reload the active configuration, applying any changes. /stop Stop the Caddy server gracefully. /status Check the status

Linux Tutorials

How to backup and restore a MySQL database

Cron Job Time Syntax Field Value Range Description Minute (0-59) 0-59 Specifies the minute at which the task should run. Example: 0 (start of the hour) Hour (0-23) 0-23 Specifies the hour of the day at which the task should run. Example: 0 (midnight) Day of the Month (1-31) 1-31

Linux Tutorials

How to find which folders and files are taking most of your space in Linux

Decluttering your filesystem can be one of the most tedious activities, but it is also vital when storage space is limited. In this article, we will streamline the process of identifying disk space hogs and help you keep your system as compact as possible. List the largest directories. Most user-related