Administration Section
This article is the third in the series 'How to Take Control of Your Network Infrastructure'. You can find the content of all articles in the series and links here. There's no point in speaking about the complete elimination of security risks. In principle, we cannot reduce them to zero. It's also important to understand that as we strive to make the network more secure, our solutions become […]
I began my immersion into the world of IT just three weeks ago. Seriously, three weeks ago I didn't even understand HTML syntax, and my acquaintance with programming languages ended with a school program in Pascal from ten years ago. However, I decided to go to an IT camp where it would be great for kids to create a bot. I thought it couldn't be that difficult. S […]
I initially wrote this article for my blog so I wouldn’t have to search for it again later, but since no one reads the blog, I wanted to share this information with everyone, in case someone might find it useful. While working on the idea of a password reset service in SAP R/3 systems, a question arose — how to launch SAP GUI with the required […]
In our projects, we use microservice architecture. When performance bottlenecks arise, a significant amount of time is spent on monitoring and analyzing logs. Logging the timings of individual operations to a log file usually makes it difficult to understand what triggered these operations, to trace the sequence of actions, or the time offset between one operation and another across different services. To minimize […]
Notable events include the drop in prices for RAM and SSDs, the launch of 5G in the USA and South Korea, as well as the imminent testing of fifth-generation networks in Russia, the hacking of Tesla's security system, Falcon Heavy as a lunar transport, and the availability of the Russian OS "Elbrus" to the public. 5G in Russia and the world Fifth-generation networks are gradually starting […]
I started working with CloudFormation 4 years ago. Since then, I have broken many infrastructures, even those that were already in production. But every time I broke something, I learned something new. Based on this experience, I will share some of the most important lessons I've learned. Lesson 1: Check changes before deploying them I learned […]
How often do you purchase something on a whim, swayed by great advertising, only for that initially desired item to gather dust in a closet, pantry, or garage until the next big clean-up or move? As a result, you face disappointment due to unmet expectations and wasted money. It’s even worse when this happens in business. Marketing tricks are often so effective that companies buy […]
Introduction to Operating Systems Hello, Habr! I would like to present to your attention a series of translated articles on literature that I find interesting — OSTEP. This material explores in depth the workings of Unix-like operating systems, specifically focusing on processes, various schedulers, memory, and other similar components that make up a modern OS. You can view the original materials here. […]
SAP HANA is a popular in-memory database management system that includes data warehouse and analytics services, built-in middleware, application server, and a platform for configuring or developing new utilities. By eliminating the delays of traditional databases, SAP HANA can significantly boost system performance, transaction processing (OLTP), and business analytics (OLAP). SAP HANA can be deployed in Appliance and TDI modes (if […]
Welcome to lesson 6. Today we will finally work with the famous Check Point graphical interface. It's what many love about Check Point, while some hate. If you remember the last lesson, I mentioned that security settings can be managed either through SmartConsole or through a special API introduced only in version R80. In this lesson […]
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 […]
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 […]