Administration Section
The early days of summer are perfect for an educational trip to St. Petersburg. We will visit Miran, linxdatacenter, RETN, and MetroTek. 5 AM, Moskovsky Railway Station, KFC, the banks of the Moika River, the Plate, pigeons on the roofs, Isaac's Cathedral, Mars Field, Captur Yandex.Drive, and there it is — Miran. Miran has housed our lab with Eva for several years, the streaming server, a virtual MikroTik RouterOS, hosting […]
So, I encountered a situation that made me sweat, as I couldn't find detailed instructions anywhere. I created problems for myself. I left the country with just one bag, with my only device being my phone) I thought I would buy a laptop there to avoid carrying one around. In the end, I bought my first, in my opinion, decent MacBook Pro 8,2 from 2011, i7-2635QM, DDR3 8GB […]
Following the shell-operator, we present its older sibling — the addon-operator. This is an Open Source project used for installing system components in a Kubernetes cluster, which can collectively be referred to as add-ons. Why do we even need any add-ons? It's no secret that Kubernetes is not an all-in-one product, and various add-ons are necessary to build a 'mature' cluster. The addon-operator will assist in installing, configuring, and […]
Certainly, you have wondered how much your project's infrastructure costs. Interestingly, the growth of expenses is not linear relative to the loads. Many business owners, CTOs, and developers subconsciously understand that they are overpaying. But for what exactly? Typically, cost reduction comes down to simply finding the cheapest solution, AWS pricing, or optimizing hardware configurations when it comes to physical racks. […]
On one street, in neighboring houses, live two women. They do not know each other, but they have one pleasant thing in common: both bake cakes. Both began trying to bake to order in 2007. One has her own business, is overwhelmed with orders, has opened courses, and is looking for a permanent space, though her pastries are tasty but quite standard, […]
Image: Unsplash DoS attacks are a major threat to information security on the modern internet. There are dozens of botnets that criminals rent out to carry out such attacks. Researchers from the University of San Diego conducted a study on how the use of proxies can help mitigate the negative effects of DoS attacks—we present to you the main points of this work. Introduction: proxies as a tool for countering […]
Mail bombing is one of the oldest forms of cyberattacks. Essentially, it resembles a traditional DoS attack, but instead of a wave of requests from different IP addresses, a flood of emails is sent to a single inbox, significantly increasing the load on it. This type of attack can render the email account unusable, […]
Objective: It is necessary to organize a VPN Tunnel between two devices, such as Mikrotik and Juniper models from the SRX series. What we have: From Mikrotik, we've chosen a model that supports IPSec hardware encryption from Mikrotik's wiki, which we found to be compact and affordable, specifically the Mikrotik hEXS. A USB modem was purchased from a nearby mobile operator, the model was Huawei […]
Before reading this article, it is recommended to familiarize yourself with the previous article: Audio over Bluetooth: a comprehensive overview of profiles, codecs, and devices. Some users of wireless headphones note low sound quality and a lack of high frequencies when using the standard Bluetooth codec SBC, which is supported by all audio devices. A common recommendation for improving sound is to purchase devices and headphones that support aptX codecs and […]
In this article, we will discuss the basics of capturing and analyzing SIP traffic generated by the 3CX phone system. The article is aimed at novice system administrators or regular users whose responsibilities include managing telephony. For a deeper dive into the topic, we recommend taking the Advanced 3CX training course. 3CX V16 allows for SIP traffic capture directly through the server's web interface and saves it in the standard Wireshark PCAP format. […]
Due to the widespread release of smartphones without a 3.5 mm audio jack, wireless Bluetooth headphones have become the primary way for many to listen to music and communicate in headset mode. Manufacturers of wireless devices do not always provide detailed product specifications, and articles about Bluetooth audio on the internet are often contradictory, at times incorrect, fail to cover all features, and frequently replicate the same inaccurate information […]
Note from the translator: The author of the original note, published on June 1, decided to conduct an experiment among those interested in information security. For this, he prepared a fake exploit for an undisclosed vulnerability in a web server and posted it on his Twitter. His assumptions — to be instantly exposed by specialists who would see the obvious deception in the code — not only did not come true… They exceeded all expectations, […]