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Xiaomi TV A 55 2025 - Introduction and basic optimization
Introduction The Xiaomi TV A 55 2025 features a 55-inch 4K UHD display with HDR10/HLG support and MEMC technology for motion smoothing. It runs on a quad-core A55 CPU with 2GB RAM and 8GB ROM, integrating Google TV and Chromecast. Connectivity includes dual-b...
Transferencia de dominio Dynu -> Cloudflare
Introducción El objetivo de este capítulo es mostrar el proceso de transferencia de dominio de un registrar a otro, en este caso, de Dynu a Cloudflare. El motivo principal es tener la gestión centralizada en un mismo sitio ya que actualmente el dominio sergio...
Module 1: Introduction to Cybersecurity
Cybersecurity is the ongoing effort to protect individuals, organizations and governments from digital attacks by protecting networked systems and data from unauthorized use or harm. Personal data is any information that can be used to identify you, and it can...
Using Android Debug Bridge (ADB) to remotely send commands to an Android device
Android Debug Bridge (adb) is a versatile command-line tool that lets you communicate with a device. The adb command facilitates a variety of device actions, such as installing and debugging apps. adb provides access to a Unix shell that you can use to run a v...
Slow sorting on an SSD folder with a lot mixed media
Problem You want to make the sorting process faster (as it somehow was before) on a folder that contains a huge amount of folder and files. Solution We have to fix the folder optimization to treat this H:\Descargas folder in the example as a standard ...
Transferencia del dominio a Dynu
A finales de 2023, antes de que venciese el año y se renovase automáticamente el dominio en Nominalia, lo transferí a Dynu ya que el precio era la mitad de lo que costaría la renovación en Nominalia. Como ya tenía la gestión del DDNS en Dynu, de esta forma cen...
Cloudflare: Introducción y setup
¿Cómo funciona Cloudflare? Básicamente, Cloudflare es una vasta red de servidores que puede mejorar la seguridad, el rendimiento y la fiabilidad de cualquier recurso conectado a Internet. Para ello, Cloudflare funciona como un proxy inverso para tu tráfico ...
Configuración de Cloudflare
Email Routing Ocultar mi email con Cloudflare Email Routing me permite crear un alias personalizado (como el que aparece en la pagina de bienvenida de la wiki: inquiries@sergio-jimenez.net) que reenvie correos a mi cuenta real, protegiendo mi dirección princi...
Actualización de los registros DNS de Cloudflare via API
Introducción Dado que los nameservers han pasado de Dynu a Cloudflare, se necesita un script similar al que se usa para la parte DDNS de Dynu. API de Cloudflare La API de Cloudflare permite actualizar registros DNS con una simple llamada. Aquí lo que se b...
0. Introduction to GNS3 and its documentation
Introduction GNS3 is used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. GNS3 allows you to run a small topology consisting of only a few devices on your laptop, to those that ha...
1. Comparison of emulators
Dynamips This is the "grandfather" of network emulation. It specifically emulates the hardware of older MIPS-based Cisco routers (like the 2600, 3600, or 7200 series). It runs the actual Cisco IOS binary files. Dynamips is the technology leveraged by GNS3 sin...
2. GNS3 GUI installation on Windows / GNS3 VM installation on VMware Workstation
Download Link The official download link for the lastest stable release as of 10 May 2026: https://www.gns3.com/software/download This downloads the file GNS3-2.2.59-all-in-one-regular.exe GNS3 GUI and VM Setup On the installer, at the Choose Component...
3. Creating a Project and GUI Tuning
Projects and Resources After configuring the GNS3 VM, we can finally launch the GNS3 GUI and start a new project, which I will name "CCNA Security" (I will use it on the CCNA Security Labs). At the right section "Servers Summary", we can see both the GNS3 ...
Lab 1-1: Cisco Secure ACS 5.8.1 - Introduction and VMware Installation
Introduction ACS is a policy-based security server that provides standards-compliant Authentication, Authorization, and Accounting (AAA) services to your network. ACS facilitates the administrative management of Cisco and non-Cisco devices and applications. ...
Lab 1-2: Cisco Secure ACS 5.8.1 - Licensing
Introduction After succesfully installing the ACS on a VMware VM and accessing the GUI, we are prompted to enter a license, otherwirse the product cannot be used: Obtaning an Evaluation License from cisco.com Go to Cisco Software Central and then access...
Huawei E3372s-153 - Full Guide
Introduction HUAWEI E3372s-153 is a high-speed packet access mobile hotspot. It is a multi-mode wireless terminal for SOHO (Small Office and Home Office) and business professionals. The E3372s-153 supports the following standards: Long Term Evolution（LTE）...
OpenWRT - Introduction
Introduction OpenWrt is a highly extensible GNU/Linux distribution for embedded devices (typically wireless routers). Unlike many other distributions for routers, OpenWrt is built from the ground up to be a full-featured, easily modifiable operating system fo...
OpenWRT - Installation on Raspberry Pi 3 Model B
Introduction In the previous page of this chapter we saw an introduction to OpenWRT and also checked the doc page for the Raspberry Pi. There, we confirmed the latest available release for the Pi 3 Model B which is 24.10.4 (as of May 2026). Download and Fl...
OpenWRT - Initial WWAN Internet Access (Raspberry Pi 3 Model B)
Connecting to Internet using the WWAN Interface Continuing where we left on the last page, we can see there is only a LAN interface, but in the current situation we don't have internet access. We will use the integrated WiFi chip (Cypress CYW43455) on the Pi ...
OpenWRT - Using a 4G USB Modem as a WWAN for Internet Access (Pi 3 Model B)
Introduction On the following page: Huawei E3372s-153 - Full Guide I explained how to prepare a Huawei E3372s-153 modem to work in stick mode, which means it can be used on OpenWRT installed on a Pi 3 Model B (i.e). On this page I will explain how can ...