Dear friends, brave critics, quiet readers, and secret admirers, the SDSM is coming to an end. I can't boast that over the past 7 years I've covered all topics in the networking sphere or that I've fully explored even one of them. But that wasn't the goal. The aim of this series of articles was to gently guide a young student into […]
This article is purely practical and dedicated to my sad story. While preparing for Zero Touch PROD for RDS (MS SQL), about which we have been told endlessly, I made a presentation (POC - Proof Of Concept) for automation: a set of Powershell scripts. After the presentation, when the thunderous, prolonged applause turned into endless ovations, I was told - all this is good, but […]
It all started with the author purchasing an interesting device on the secondary market - Smart Response XE (brief description). It is intended for schools: each student in the class receives a device similar to an electronic notepad or a translator from the nineties, the teacher asks a question, and the students type their answers on the devices' keyboards, which are transmitted via radio channel (802.15.4) to a receiver connected to the teacher's PC. […]
This article is about how to set up a modern mail server. Postfix + Dovecot. SPF + DKIM + rDNS. With IPv6. With TSL encryption. Supporting multiple domains - part with a real SSL certificate. With anti-spam protection and a high anti-spam rating from other mail servers. Supporting multiple physical interfaces. With OpenVPN, connected via IPv4, and which […]
About digitalization and more, and not so much. Life as a Service ( ЖКУ) or in English 'Life as a Service' (LaaS) has already found expression in the minds of several individuals or groups of people: here it has been considered from the perspective of overall life digitalization, turning all its aspects into services and the required new political system of capitalocommunism, and here […]
Microsoft has officially released the first builds of the updated Edge browser online. Currently, these are Canary and Developer versions. The beta is promised to be released soon, with updates every 6 weeks. Daily updates will be available on the Canary channel, and weekly on the Dev channel. The new version of Microsoft Edge is based on the Chromium engine, which allows it to use extensions for […]
Microsoft announced the Edge browser based on Chromium back in December, but the release date is still unknown. Recently, an early unofficial build was released. Additionally, Google has decided to move the "Focus Mode" feature to Chromium, after which it will return in the new version of Microsoft Edge. It is reported that this feature will allow users to pin the necessary web pages to […]
A Brief Introduction Steganography, if anyone remembers, is the hiding of information within some containers. For example, in images (discussed here and here). You can also hide data in the metadata tables of the file system (this was written about here), and even in the service packets of the TCP protocol. Unfortunately, all these methods have one drawback: to discreetly 'inject' information into […]
A long time ago, I wrote my first post on Habr. This post was dedicated to a quite interesting problem, namely steganography. Of course, the solution proposed in that old topic cannot truly be called steganography in the strict sense of the word. It's just a game with file formats, but nonetheless, quite an interesting game. Today, we will try to delve a little deeper […]
The Source of the Image Go is a relatively young yet popular programming language. According to a Stack Overflow survey, Golang ranked third among the programming languages that developers want to learn. In this article, we will try to understand the reasons for Go's popularity, as well as look at where this language is used and why it is worth learning. A Bit of History The Go programming language was created by Google. Its full name, Golang, is derived from […]
Introduction Greetings. Not too long ago, when I was studying at university, I had a term project for the course 'Software Methods of Information Protection.' The assignment required creating a program that embeds a message in GIF format files. I decided to do it in Java. In this article, I will describe some theoretical aspects, as well as how this small program was created. Theoretical Part GIF Format GIF (Graphics Interchange […]
Hello, Habr. I would like to introduce you to a small project on steganography that I created in my free time from studying. I made a project on the covert storage of information in the file system (hereafter FS). This can be applied for stealing confidential information for educational purposes. The experimental sample chosen was the rather old Linux file system ext2. Implementation Considerations for Implementation If one can 'really dig deep' […]