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Samba DC as a second controller in the AD domain Windows 2012R2 and roaming folders for clients on Windows and Linux

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The realization that I had entered a substitute import environment didn't come immediately. It was only when fresh PC shipments from the higher organization started consistently arriving with the 'Alt Linux' distribution on board that I suspected something was off. However, as I went through the stages of accepting the inevitable, I got involved and even began to enjoy the process a bit. At one point, I thought that such […]

Backup, Part 4: Overview and Testing of zbackup, restic, borgbackup

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This article will discuss software tools for backup that create a repository by splitting data streams into separate components (chunks). The components of the repository can be further compressed and encrypted, and most importantly — during subsequent backup processes — can be reused. A backup in such a repository is a named chain of interrelated components, for example, at […]

Polaris has been introduced to keep Kubernetes clusters healthy

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Note: The original text was written by Rob Scott — the lead SRE engineer at ReactiveOps, the company behind this announced project. We are very much aligned with the idea of centralized validation of what is being deployed in Kubernetes, which is why we are following such initiatives with interest. I'm pleased to introduce Polaris — an open-source project that helps maintain the 'health' of a Kubernetes cluster. We […]

Memory on cylindrical magnetic domains. Part 1. Operating principle

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Photo from the author's collection 1. Bubble memory, or memory on cylindrical magnetic domains, is non-volatile memory developed at Bell Labs in 1967 by Andrew Bobeck. Research has shown that small cylindrical magnetic domains form in single-crystal thin films of ferrites and garnets when a sufficiently strong magnetic field is applied perpendicular to the film surface. By changing the magnetic field, […]

The core software of the onboard cyber infrastructure of the unified strike fighter F-35

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Overview of the key components of the "Autonomous Logistics Information System" (ALIS) for the unified strike fighter F-35. A detailed analysis of the "combat application support block" and its four key components: 1) human-system interface, 2) execution-control system, 3) onboard immunity system, 4) avionics system. Some information about the software and hardware of the F-35 fighter and the tools used for its onboard software. A comparison is provided […]

Cisco 200-125 CCNA v3.0 Training. Day 8. Switch Configuration

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Welcome to the world of switches! Today, we're going to talk about switches. Imagine you're a network administrator at a new company. A manager approaches you with a "box-fresh" switch and asks you to set it up. You might have thought that they were referring to a regular electrical switch (in English, the word switch refers to both a network switch and an electrical […]

Backup, part 3: Overview and testing of duplicity, duplicati

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This note covers backup tools that perform backups by creating archives on a backup server. Among those that meet the requirements are duplicity (which has a nice interface in the form of deja dup) and duplicati. Another noteworthy backup tool is dar, but because it has a very extensive list of options—the methodology […]

Zimbra Collaboration Suite and mobile device management with ABQ

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The rapid development of portable electronics, particularly smartphones and tablets, has created numerous new challenges for corporate information security. Indeed, while previously all cybersecurity was built around creating a secure perimeter and subsequently protecting it, now, when almost every employee uses their own mobile devices for work tasks, controlling the security perimeter has become very difficult. Especially this […]

It is believed that the DANE technology for browsers has failed

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We are discussing what the DANE technology is for authenticating domain names via DNS and why it has not gained widespread adoption in browsers. / Unsplash / Paulius Dragunas What is DANE Certification Authorities (CAs) are organizations that issue cryptographic SSL certificates. They place their electronic signature on them, confirming their authenticity. However, situations occasionally arise when […]

How to Choose a Proxy Network for Business: 3 Practical Tips

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Image: Unsplash Masking an IP address using a proxy is not only for bypassing censorship on the internet and watching series. In recent years, proxies have increasingly been used for solving corporate tasks, from application load testing to competitive intelligence. Habr has a good overview of various proxy use cases in business. Today we will talk about […]

Daily reports on the status of virtual machines using R and PowerShell

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Introduction Good day. For the past six months, we have been using a script (or rather a set of scripts) that generates reports on the status of virtual machines (and more). I decided to share the experience of creating it and the code itself. I welcome criticism and hope this material can be useful to someone. Identifying the Need We have many virtual machines (about 1500 VMs distributed across 3 […]

Upgrade the disk subsystem of an old server from PCIe 1.0 to 2.0

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Why the subject of this article is a disk subsystem upgrade. It is clear that in the first place, one usually needs to: Increase RAM. This is such an obvious step that I didn’t even think it was necessary to write about it in the main article. Install additional processor(s) or replace both processors with the most powerful versions supported by the server sockets. For older servers, RAM and processors are […]

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