Networking

Cómo listar y eliminar reglas de firewall de Iptables — step-by-step Security tutorial on Progressive Robot

Cómo listar y eliminar reglas de firewall de Iptables

Iptables es una tecnología de firewall que tiene una función esencial en la seguridad de la red para muchos sistemas Linux. En este tutorial, veremos cómo hacer las siguientes tareas de iptables: listar reglas, borrar contadores de paquetes y bytes, eliminar reglas, vaciar cadenas (eliminar todas las reglas de una cadena) y restablecer por completo un firewall de iptables.

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How To Use Confd and Etcd to Dynamically Reconfigure Services in CoreOS — step-by-step Web Servers tutorial on Progressive Robot

How To Use Confd and Etcd to Dynamically Reconfigure Services in CoreOS

Etcd is a globally distributed key-value store that is available in CoreOS installations. By registering services in this store, related applications can adjust their configuration based on the values available. In this guide, we will demonstrate how to configure `confd` to monitor `etcd` in order to dynamically generate an Nginx configuration. Continuous polling of `etcd` allows us to configure Nginx as a load balancer that adjusts its list of backend servers as they are started or stopped.

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How To Use Traceroute and MTR to Diagnose Network Issues — step-by-step DevOps tutorial on Progressive Robot

How To Use Traceroute and MTR to Diagnose Network Issues

In this guide, we will discuss how to use traceroute and mtr to diagnose network issues. These tools and utilities will provide a good overview of what stage of the network is causing problems. You can tell if an issue falls within your realm of influence or whether you need to contact the owners or maintainers of alternate networks.

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UFW Essentials : règles et commandes de pare-feu — step-by-step Linux tutorial on Progressive Robot

UFW Essentials : règles et commandes de pare-feu

UFW est un outil de configuration de pare-feu pour les iptables qui est inclus dans Ubuntu par défaut. Sous forme d’aide-mémo, ce guide vous permettra de trouver rapidement les commandes UFW qui créeront des règles de pare-feu iptables qui sont utiles dans les scénarios classiques du quotidien. Ceci intègre des exemples UFW d’autorisation et de blocage de plusieurs services par port, interface de réseau ou adresse IP source.

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What is a DDoS Attack? — step-by-step DevOps tutorial on Progressive Robot

What is a DDoS Attack?

A Distributed Denial of Service (or DDoS) attack is a malicious attempt to deny legitimate traffic to a targeted server by flooding it with spurious requests. The attacker often accomplishes this by infecting a fleet of servers and internet-connected devices (a botnet) with malware. This botnet…

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What is Kubernetes? — step-by-step Docker tutorial on Progressive Robot

What is Kubernetes?

Kubernetes is a container management system meant to be deployed on Docker-capable clustered environments. In this guide, we will discuss some of the basic concepts that Kubernetes introduces. We will discuss some of the design decisions and what makes this different from other cluster-related technologies.

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