Administration Section
ACL (Access Control List) on network devices can be implemented both hardware and software-based. If software-based ACLs are quite straightforward — these are rules stored and processed in RAM (i.e., on the Control Plane), with all the inherent limitations, then how are hardware-based ACLs implemented and function […]
Hello everyone. With the upcoming launch of a new group for the 'Linux Administrator' course, we are publishing useful material written by our student and course mentor, technical support specialist for corporate products at REG.RU — Roman Travin. This article will cover two cases of replacing disks and transferring data to new, larger disks with subsequent array and file system expansion. The first […]
In the whirlwind of holidays and the various events following the break, it could be easy to overlook that the long-awaited release of Veeam Availability Suite version 10.0 will be available very soon—in February. There has been a lot of material released about the new features, including presentations at online and offline conferences, blog posts, and discussions in various communities in different languages. For those, […]
No, launching a decentralized application (dapp) on blockchain will not guarantee business success. In fact, most users don't even consider whether the application runs on blockchain—they simply choose the product that is cheaper, faster, and easier. Unfortunately, even if blockchain has its unique features and advantages, most applications that run on it are much more expensive, […]
At RIT 2019, our colleague Alexander Korotkov delivered a presentation on automating development at CIAN: to simplify life and work, we use our own platform Integro. It tracks the lifecycle of tasks, removes routine operations from developers, and significantly reduces the number of bugs in production. In this post, we will supplement Alexander's presentation and describe how we went from simple […]
I know many Data Scientists — and I would consider myself one of them — who work on GPU machines, either local or virtual, located in the cloud, whether through Jupyter Notebook or some Python development environment. While working for 2 years as an AI/ML development expert, I did exactly that, while preparing data on a regular server […]
In the Telegram chat @router_os, I often see questions about how to save on purchasing a Mikrotik license or how to use RouterOS for free. Surprisingly, there are indeed legal ways to do this. In this article, I will not address the licensing of Mikrotik hardware devices, as they come with the maximum license that can be supported from the factory […]
Some of us do not use the internet without a VPN for various reasons: some require a dedicated IP, and it is easier and cheaper to purchase a VPS with two IPs than to buy an address from a provider, others want access to all websites, not just those permitted in Russia, and some need IPv6 but the provider does not offer it… Most often […]
Hello everyone, I recently read an old article about speeding up OpenVPN on a router by moving encryption to a separate piece of hardware that is soldered inside the router itself. I have a similar situation as the author — a TP-Link WDR3500 with 128 megabytes of RAM and a poor processor that completely struggles with tunnel encryption. However, I absolutely […]
Recently, we received LIR status and a /29 block of IPv6. Following this, the need arose to keep track of assigned subnets. And since our billing system is written in PHP, we had to delve into the matter and realize that this language is not the most user-friendly for working with IPv6. Below, we present our solutions for the tasks concerning addresses and […]
Let's talk about eSIM (the full name embeddedSIM — that is, embedded SIM) — SIM cards soldered into gadgets (unlike the usual removable SIM cards). We'll discuss how they are better than traditional SIM cards and why major mobile operators are resisting the adoption of this new technology. This article is written with support from EDISON. We develop applications for Android and iOS, and we can also take on […]
This article is a continuation of the previous one – "Creating a Resilient IT Infrastructure. Part 1 – Preparing for the Deployment of the oVirt 4.3 Cluster." It will cover the process of basic installation and configuration of the oVirt 4.3 cluster for hosting highly available virtual machines, given that all preliminary steps for infrastructure preparation have already been completed. Introduction The main goal of this article is to […]