ProHoster > Articles on: Yuri Gagarin

Author: Yuri Gagarin

A technical specialist at ProHoster with over six years of experience in server administration, VPN solutions, and network security. I manage infrastructure setup and support, monitor service stability, and implement solutions to protect client data. I also contribute to performance optimization and compliance with modern security and privacy requirements.

RIPE has allocated the last free block of IPv4 addresses

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The regional internet registry RIPE NCC, which is responsible for distributing IP addresses in Europe, Central Asia, and parts of Asia, has announced the allocation of the last available block of IPv4 addresses. In 2012, RIPE began distributing the last /8 block of addresses (approximately 17 million addresses) and reduced the maximum subnet size allocated to /22 (1024 addresses). Yesterday, the last /22 block was allocated, and there are no more available […]

The history of educational software: the first personal computers, educational games, and software for students

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Last time we discussed how attempts to automate the learning process led to the creation of the very advanced PLATO system in the 1960s for its time. Many educational courses on various subjects were developed for it. However, PLATO had a drawback — access to the educational materials was available only to university students with special terminals. The situation changed with the arrival of personal computers. […]

My first experience restoring a Postgres database after a crash (invalid page in block 4123007 of relation base/16490)

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I want to share with you my first successful experience in restoring full functionality to a Postgres database. I became acquainted with the Postgres DBMS six months ago, and prior to that, I had no experience administering databases at all. I work as a semi-DevOps engineer at a large IT company. Our company develops software for high-load services, and I am responsible for the functionality and maintenance […]

Bitcoin in a cage?

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It so happened that my profession is a computer systems and networks administrator (in short: sysadmin), and over the course of more than 10 years of professional activity, I have worked with various systems, including those requiring [enhanced|additional] security measures. Additionally, some time ago, I found Bitcoin interesting, and I not only used it but also launched […]

uBlock Origin has added protection against a new tracking method that manipulates DNS names.

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Users of uBlock Origin have noticed the use of a new tracking technique by advertising networks and web analytics systems that is not blocked by uBlock Origin or other extensions designed to filter unwanted content. The essence of the method is that website owners wishing to place tracking or advertising code create a separate subdomain in DNS that points to the advertising server […]

Release Knoppix 8.6.1

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Klaus Knopper has announced the release of KNOPPIX 8.6.1, an updated build of the live DVD distribution image based on Debian, featuring LXDE as the default desktop, KDE Plasma 5.14, and GNOME 3.30, without the systemd software package and with a new version of the Linux kernel 5.3.5. The new version includes: Updated Linux kernel and system software […]

How I went to a meeting at School 21

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Hello, not long ago I learned about the wonder school School 21 from an ad. The first impression from everything I read was wonderful. Nobody bothers you, you get assignments, and you work at your own pace. There’s teamwork, interesting acquaintances, and two internships in the largest IT companies in the country, plus everything is free with accommodations in a dormitory (Kazan). In […]

From Blockchain to DAG: Eliminating Intermediaries

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In this article, I will tell you about DAG (Directed Acyclic Graph) and its application in distributed ledgers, and we will compare it to blockchain. DAG is not something new in the world of cryptocurrencies. You may have heard of it as a solution to blockchain scalability issues. But today we will not talk about scalability, but about […]

Personal data in the RF: who are we? Where are we going?

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In recent years, we have all heard the phrase “personal data.” To a greater or lesser extent, we have aligned our business processes with the legal requirements in this area. The number of inspections by Roskomnadzor that discovered violations in this area this year is steadily approaching 100%. Statistics from the Roskomnadzor Office for the Central Federal District for the first half of 2019 show 131 violations for […]

Installing VMware ESXi on Mac Pro 1,1

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In this article, I describe my experience installing VMware ESXi on an old Apple Mac Pro 1,1. The task from the client was to expand the file server. How a file server for the company was created on a PowerMac G5 in 2016, and what it was like to maintain the created legacy deserves a separate article. It was decided to combine the expansion with modernization and make a file server out of the existing MacPro. And […]

Over the past year, more than 480 million mobile VPN applications have been downloaded.

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According to online sources, over the past 12 months, more than 480 million mobile VPN applications were downloaded from digital content stores for Android and iOS platforms. Compared to the previous similar period, when about 311 million VPN applications were downloaded, there is a noted increase in popularity of solutions in this category by 54%. Users of Android devices downloaded 358.3 million […]

Firefox has user identification method blocking enabled by default.

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In the nightly builds of Firefox, which will form the basis for the upcoming release of Firefox 72 on January 7, user tracking protection via hidden identification methods (“browser fingerprinting”) is enabled by default. The protection against hidden tracking is included in the default unwanted content blocking mode and is applied according to additional categories in the Disconnect.me list, which includes hosts that have been caught in […]

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