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How-to Install SSH Server on Linux 

By JMCristobal
January 11, 2023
1.- Install with apt-get command on Ubuntu: sudo apt-get install openssh-server 1.- Install with dnf command on Fedora: sudo dnf install openssh-server 2.- Enable the ssh service: sudo ...
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CCNA

Configure serial interface with encapsulation PPP and PAP authentication

By JMCristobal
November 16, 2022
PPP is a standard protocol used to send data over synchronous serial links. PPP also provides a Link Control Protocol (LCP) for negotiating the properties of the link. ...
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CCNA

Configure serial interface with encapsulation PPP and CHAP authentication

By JMCristobal
November 9, 2022
PPP is a standard protocol used to send data over synchronous serial links. PPP also provides a Link Control Protocol (LCP) for negotiating the properties of the link. ...
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CCNA

Configure serial interface with encapsulation HDLC

By JMCristobal
October 12, 2022
Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for sending data over synchronous serial links. Cisco HDLC is the default for data encapsulation at Layer ...
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CCNA Networking Fundamentals

What is a network and its components?

By JMCristobal
September 28, 2022
A computer network is a group of computers (PCs) or similar devices connected to access and share network resources, such as files, storage space, printers, IP telephony, and ...
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CCNA Enterprise Infrastructure

Autonomous System Numbers – BGP

By JMCristobal
September 14, 2022
There are two types of BGP Autonomous system numbers: Private and Public. Various routing protocols use Autonomous System (AS) Numbers. IANA allocates AS Numbers to Regional Internet Registries ...
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Security

Upgrade ASA an Active/Standby Failover Pair Using the CLI

By JMCristobal
August 20, 2022
In this tutorial, we will update two ASA firewall 5585-X from CLI. Actual version 9.8.4.20Target version 9.8.4.44 Note: Perform these steps on the active unit Step 1 – ...
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Security

Configuring an SFTP repository in ISE

By JMCristobal
July 27, 2022
Cisco ISE allows you to create and delete repositories through the administrator portal. You can create the following types of repositories: Disk, FTP, SFTP, NFS, CD-ROM, HTTP and ...
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Devnet Linux

Install Docker in Ubuntu

By JMCristobal
June 15, 2022
In this article we will learn how to install Docker on an Ubuntu 20.04 operating system. 1.-Installing the initial requirements with the following commands. sudo apt-get update sudo ...
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CCNA Networking Fundamentals

Introduction to networks

By JMCristobal
June 1, 2022
Today’s networks have changed unimaginably; in just a few years, their limitations have evolved on a large scale. The first data networks could only exchange character-based information. Today ...
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Devnet Linux

Creating a virtual environment with VENV – Python

By JMCristobal
May 18, 2022
This article teaches how to set up a python virtual environment on a Ubuntu 20.04.An Environment Virtual allows you to manage separate package installations for different projects. They ...
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Enterprise Infrastructure

EIGRP Configuration

By JMCristobal
May 4, 2022
Enhaced Interior Gateway Routing Protocol – EIGRP Its internal administrative distance is 90, and the external one is 170. So that a router configured with EIGRP can exchange ...
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Devnet Linux

Install python in Ubuntu 20.04

By JMCristobal
April 20, 2022
Python 3 is installed by default on the Ubuntu 20.04 Linux distribution. To ensure that our versions are up to date, we will update and upgrade the system ...
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Devnet Linux

Basic Git Commands

By JMCristobal
March 30, 2022
We show you the most common Git commands in this Cheat Sheet. It is difficult to memorize all the important Git commands, so save this article for future ...
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Security

Umbrella and YouTube live streaming issues

By JMCristobal
March 23, 2022
A few days ago, we decided to enable Enforce SafeSearch in some Umbrella policies. However, we received several reports with problems accessing YouTube live streaming. After the change, ...
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This website is free and educational. Contains my thoughts and ideas, which may not represent the thoughts of the various technologies mentioned here. All product names, logos, and illustrations are copyright/trademarks of their respective owners.
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