Administration Section
This article is dedicated to the peculiarities of monitoring network equipment using the SNMPv3 protocol. We will discuss SNMPv3, I will share my findings on creating comprehensive templates in Zabbix, and I will show what can be achieved when organizing distributed alerting in a large network. The SNMP protocol is essential for monitoring network equipment, and Zabbix is excellent for monitoring a large number of objects and […]
Noticing something wrong with your network lately? For instance, my Wi-Fi regularly disconnects, my favorite VPN stopped working, and some websites take five seconds to load or donāt have images at all. Governments around the world have imposed quarantine and restricted peopleās movement due to the coronavirus. As a result, there has been a significant increase in internet traffic across the board. […]
Introduction The concept of building a 'Digital Substation' in the power industry requires synchronization with an accuracy of 1 Ī¼s. Financial transactions also require precision in microseconds. In these applications, the accuracy of NTP is no longer sufficient. The PTPv2 synchronization protocol, described by the IEEE 1588v2 standard, enables synchronization accuracy of a few tens of nanoseconds. PTPv2 allows sending synchronization packets over L2 and L3 networks. The main […]
Introduction Recently, while working on my thesis, I encountered the need to create an Ubuntu image for a single-board computer with ROS (Robot Operating System) already installed. Briefly, the thesis focuses on managing a group of robots. The robots are equipped with two wheels and three range finders. Everything is controlled from ROS running on an ODROID-C2 board. Robot Ladybug. Sorry for […]
The material of the article is taken from my Zen channel. Introduction This article is the beginning of a series about real-time processing of media data using the Mediastreamer2 engine. The presentation will involve minimal skills in Linux terminal operations and programming in C. Mediastreamer2 is a VoIP engine that is the basis of the popular open-source VoIP phone project Linphone. In Linphone, Mediastreamer2 implements all functions […]
Hello, Habr! I present to you a translation of an article from APC magazine. This article discusses the complete installation of a Linux operating environment along with a graphical desktop environment on Android devices. One of the key technologies employed by many Linux systems on Android is pRoot. This is an implementation of the chroot utility in user space, which is very popular in desktop systems […]
No matter how advanced technology becomes, there is always a trail of outdated approaches that follow. This may be due to a gradual transition, human factors, technological necessities, or something else. In the field of data processing, data sources are particularly indicative of this issue. No matter how much we wish to eliminate this, a portion of data is still transmitted through messengers and emails […]
Good afternoon, in previous articles we explored the workings of the ELK Stack. Now, letās discuss the possibilities available to an information security specialist when using these systems. What logs should be created and stored in Elasticsearch? We will examine what statistics can be derived from configuring dashboards and whether there is profitability in it. How can we implement automation of information security processes using the stack […]
In light of the COVID-19 pandemic and the widespread lockdown in many countries, the only way for many companies to continue operating has been through remote access to workplaces via the internet. There are many relatively safe methods for remote work, but given the scale of the problem, a simple solution for all users for connecting to the office remotely without the need for additional configurations is necessary […]
This article describes the implementation of pipelines in Unix. I was somewhat disappointed that a recent article titled āHow Pipelines Work in Unix?ā was not about the internal structure. It piqued my interest, and I dug into old sources to find the answer. Whatās the essence? Pipelinesāāprobably the most important invention in Unixāāare a defining characteristic […]
The author of the article, Douglas McIlroy, is an American mathematician, engineer, and programmer. He is best known for developing the pipeline concept in the Unix operating system, principles of component-oriented programming, and several original utilities: spell, diff, sort, join, speak, tr. Sometimes you come across truly remarkable programs. After rummaging through my memory, I compiled a list of true gems of Unix over the years. Mostly, they are quite rare and not […]
In the current climate, more companies are considering how to transition employees to remote work. In turn, we decided to assist them by writing detailed instructions for setting up remote access based on the FortiGate solution: Remote access via IPsec VPN Remote access via SSL VPN Additionally, we have gathered a wealth of other material that may also be […]