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Autonegotiation and duplex mismatch theory
Introduction to autonegotiation For any 10/100 or 10/100/1000 interfaces (that is, interfaces that can run at different speeds), Cisco Catalyst switches default to a setting of duplex auto and speed auto. As a result, those interfaces attempt to automatically...
Instalación de Windows 98
En primer lugar, tener en cuenta que hay que desconectar fisicamente el segundo disco duro. Si el PC tiene dos discos duros, el primero tendrá la letra C y el segundo la D.Al insertar el disquete de inicio (unidad A:) y seleccionar la instalación con CD-ROM,...
Paso 1: Backup de BBDD y otros archivos de configuración
El primer paso para la migración de Bookstack instalado en una Raspberry Pi con Ubuntu 22.04 a otra con Raspberry Pi OS Lite (32-bit) basado en Debian 12 bookworm, es hacer backup en la actual de lo siguiente: BBDD Usar el siguiente comando: sudo mysqldump ...
Paso 2: Instalación de Raspbian y paso de los archivos de backup
Por el modelo de Raspberry (3 B+), se instala Raspberry Pi OS Lite (32-bit): A fecha 26/12/2023, esta es la versión más reciente Instalar con Raspberry Pi Imager, editando las opciones antes de instalar. Ojo, escribir siempre la password antes de instalar: ...
Paso 3: Instalación limpia de Bookstack
En este punto se hace una instalación limpia de Bookstack. Para ello se hace uso del script que tiene Dan Brown en la guía de instalación para Ubuntu 22.04 pero algo modificado: Script modificado en mi GitHub Las modificaciones son las siguientes: Cambio en...
Paso 4: Restore de BBDD y el resto de archivos + consideraciones para dejarlo todo como estaba
Empezamos con el restore de la BBDD: sudo mysql -u root bookstack < bookstack.backup.sql Después de esto, ir a /var/www/bookstack y ejecutar php artisan migrate como se indica en los docs. por si acaso. Lo normal es que diga que no hay nada que migrar. Co...
Anexo: Fuentes
Installing BookStack on Debian 12 (Bookworm) with HTTPShttps://www.youtube.com/watch?v=UpwfeFmzxLk missing images #4146https://github.com/BookStackApp/BookStack/issues/4146#issuecomment-1493497503 Install and Configure Sambahttps://ubuntu.com/tutorials/insta...
Instalación de drivers + otras cosas útiles
Al cargar por primera vez con un mouse conectado por USB, dejar que seleccione el driver por defecto (dispositivo HID) y continuar. Lo mismo con el monitor, seleccionar el driver por defecto Monitor PnP genérico Dado que no hay un driver para dispositivos ...
Reverse telnet theory + practical example
When a user telnets to a router, he is “logged on” directly to the router. Cisco adds a special twist: if you telnet to a special port on the router, the router redirects the incoming telnet connection back out a selected asynchronous line, rather than interna...
How to make an RJ45 to RJ45 rollover cable
A rollover cable (also known as a Yost cable, Cisco cable, or a Console cable) is a type of null-modem cable that is used to connect a computer terminal to a router's console port. This cable is typically flat (and has a light blue color) to help distinguish i...
US Robotics 56K Faxmodem installation on Windows 98 (drivers + ControlCenter)
Shut down your computer and connect the serial modem cable to the modem and the computer. Plug in the modem's power supply and turn on Windows 98 When the following screen appears (which happens when the modem is detected by Plu...
Anexo - Consideraciones
31/12/2023: Al quitar el modo bridge del HGU y usarlo de nuevo como router por defecto (reset de fabrica incluido), la Raspberry ha cogido una IPv6 del server DHCP del router y cuando intenta resolver a sergio-jimenez.net lo hace mediante IPv6 por defecto. L...
What is an ATA (Analog Telephone Adapter?
An analog telephone adapter (ATA) or foreign exchange station (FXS) gateway, is a device for connecting traditional analog telephones, fax machines, and similar customer-premises devices to a digital telephone system or a VoIP telephone network. An ATA is oft...
What is the Cisco SPA122 ATA with Router?
The Cisco SPA122 ATA with Router combines VoIP services with an internal router for LAN connectivity. Easy to install and use, it works over an IP network to connect analog phones and fax machines to a VoIP service provider and provides support for additiona...
Cisco SPA122 factory reset and initial setup
Introduction For this lab I am using a Cisco SPA122 device (beware its EoL!). I am assuming this ATA comes preconfigured as it's used, so I'll just go ahead and do the factory reset following the instructions on the Cisco docs for the device. Then, I will do t...
Configuring Cisco SPA122 to be used with a landline phone [O2 Spain]
Introduction I have the current setup at Home 1: However, due to some needs, I needed to relocate the Movistar HGU router to another room (ROOM 2), which makes it impossible for me to run a telephone cable directly from ROOM 2 to ROOM 1. I have however an avai...
Configuring Cisco SPA122 to be used with a 56K modem
Introduction We will take on the configuration from the last post where I showed how to configure the Cisco SPA122 to be used with a landline phone, and we will modify it to be used with a US Robotics 56K Faxmodem instead of a landline phone. Say we have a U...
Using a dial-up modem on Windows 98
Introduction This is a follow-up article to installing a US Robotics 56K Faxmodem on Windows 98. We are now ready to test the modem connection to Internet and see if it still works in 2024. Connection nodes still available in Spain At the end of the 90's,...