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.

Do not open ports to the world — you will be hacked (risks)

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Again and again, after conducting an audit, I face a wall of misunderstanding concerning my recommendations to hide ports behind a whitelist. Even very skilled admins/DevOps ask, 'Why?!?' I propose considering the risks in descending order of likelihood and damage. Configuration error DDoS by IP Brute force Service vulnerabilities Kernel stack vulnerabilities Amplification of DDoS attacks Configuration error The most typical and dangerous situation. How […]

Machine learning without Python, Anaconda, and other dependencies

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No, well, of course I’m not serious. There must be a limit to how much one can simplify the subject. But for the initial stages, to grasp basic concepts and quickly 'get into' the topic, it might be acceptable. As for how to properly name this material (options: 'Machine Learning for Dummies', 'Data Analysis from Scratch', 'Algorithms for the Very Young'), we will discuss this at the end. To […]

12 JavaScript techniques not found in most tutorials

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When I started learning JavaScript, the first thing I did was create a list of techniques that helped me save time. I picked them up from other programmers, various websites, and manuals. In this article, I'll show you 12 great ways to improve and speed up your JavaScript code. In most cases, they are universal. Reminder: all readers of "Habra" receive a discount of 10,000 […]

A serious breach has been found in the security program of Xiaomi smartphones

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Check Point has reported that a vulnerability has been discovered in the Guard Provider application for Xiaomi smartphones. This breach allows the installation of malicious code on devices without the owner's knowledge. Ironically, the program was supposed to protect the smartphone from dangerous applications. It is reported that the vulnerability enables a MITM (Man-In-The-Middle) attack. This occurs if an attacker is in the […]

News from the depths: IT giants have started actively building their own underwater trunk networks

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We have long been accustomed to the fact that large IT companies engage not only in product releases and service provision, but also actively participate in the development of internet infrastructure. Google's DNS, Amazon's cloud storage and hosting, Facebook's data centers around the world – fifteen years ago this seemed overly ambitious, but now it is the norm that everyone is used to. And now, the four largest […]

Cloud future

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We are now on the verge of a new era of cloud computing. I don't quite understand why we refer to remote server computing as 'cloud'. Of course, we should remember ruvds, which launched a server on a balloon and Microsoft with a data center underwater, but in reality, we live 'next to' servers, which will soon become our primary means of computing. What […]

Cloud Server: Preparing for Launch

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In the post about the regatta, we mentioned that in August all Hubrazhitelei can expect a competition with prizes. It's time to pull back the curtain of secrecy. At one point, we thought that the phrase 'server in the clouds' could be taken literally. So let's actually launch a functioning server into the sky that can be pinged! At first, the idea seemed crazy, but after some consideration […]

Backend section at DUMP: Serverless, Postgres, Go, .NET Core, GraphQL, and more

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On April 19, a developer conference DUMP will be held in Yekaterinburg. The program directors of the Backend section – the head of Yandex's development office Andrey Zharinov, the head of the development department of Naumen Contact Center Konstantin Beklemishev, and engineer-programmer from Kontur Denis Tarasov – shared what reports developers can expect at the conference. There is an opinion that insights should not be expected from presentations at a 'festival' conference. We think […]

Comparison of space communication systems.

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Friends, as you already know, we are working hard on a new geek project — "Server in the Clouds 2.0", or "Space Data Center". In short: on April 12, we will launch a DIY server on a stratospheric balloon at an altitude of about 30 km, we will transmit data to it through a space communication system, and from the server, we will broadcast data to Earth via radio communication. And […]

Python for the Web: What a Junior Developer Needs to Know to Work and Grow

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We have prepared a summary of the key thoughts from the Python Junior Podcast: in it, we discussed where to start and where to go as a beginner Python developer. Recently, we have had a lot of content for mid-level and senior developers, but this episode is definitely for juniors. The main topics: What knowledge does a beginner programmer need to engage in web development? What do […]

Building blocks of distributed applications. The first approximation.

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In the previous article, we covered the theoretical foundations of reactive architecture. It's time to talk about data streams, ways to implement reactive Erlang/Elixir systems, and the messaging patterns within them: Request-response, Request-Chunked Response, Response with Request, Publish-subscribe, Inverted Publish-subscribe, Task distribution. SOA, MSA and messaging SOA, MSA are system architectures that define the rules for building systems, while […]

HTTPS is not always as secure as it seems. Vulnerabilities have been found in 5.5% of HTTPS sites.

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One of Alexa's top sites (central circle), secured with HTTPS, with subdomains (grey) and dependencies (white), some of which are vulnerable (patterned fill). Nowadays, the HTTPS secured connection icon has become a standard and even a necessary attribute of any serious website. If the certificate is absent, almost all recent browsers warn that the connection to the site is "not secure" and do not recommend […]

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