Networking

Introduction> Introduction # A large part of being a system administrator is collecting accurate information about your servers and infrastructure. There are a number of tools and options for gathering and processing this type of information.

Introduction> Introduction # CoreOS allows you to easily run services in Docker containers across a cluster of machines. The procedure for doing so usually involves starting one or multiple instances of a service and then registering each instance with etcd, CoreOS’s distributed key-value store.

Introduction> Introduction # UFW, or Uncomplicated Firewall, is an interface to iptables that is geared towards simplifying the process of configuring a firewall. While iptables is a solid and flexible tool, it can be difficult for beginners to learn how to use it to properly configure a firewall.

Introduction> Introduction # NFS, or Network File System, is a distributed file system protocol that allows you to mount remote directories on your server. This lets you manage storage space in a different location and write to that space from multiple clients.

Introduction> Introduction # In this tutorial, we will go over how to use Tinc, an open source Virtual Private Network (VPN) daemon, to create a secure VPN that your servers can communicate on as if they were on a local network.

Introduction> Introduction # NFS, or Network File System, is a distributed file system protocol that allows you to mount remote directories on your server. This lets you manage storage space in a different location and write to that space from multiple clients.

Introduction> Introduction # Consul is a distributed, highly available, datacenter-aware, service discovery and configuration system. It can be used to present services and nodes in a flexible and powerful interface that allows clients to always have an up-to-date view of the infrastructure they are a part of.

Introduction> Introduction # SSH is a secure protocol used as the primary means of connecting to Linux servers remotely. It provides a text-based interface by spawning a remote shell. After connecting, all commands you type in your local terminal are sent to the remote server and executed there.

Introduction> Introduction # An important part of administering servers is monitoring network connectivity. There are a few tools that are simple to use, but valuable to know. In this guide, we will discuss how to use a tool called traceroute to diagnose where a network issue may be happening.

Introduction> Introduction # One essential tool to master as a system administrator is SSH. SSH, or Secure Shell, is a protocol used to securely log onto remote systems. It is the most common way to access remote Linux servers.

Introduction> Introduction # Understanding networking is a fundamental part of configuring complex environments on the internet. This has implications when trying to communicate between servers efficiently, developing secure network policies, and keeping your nodes organized.

Introduction> Introduction # One of the technologies that makes CoreOS possible is etcd, a globally distributed key-value store. This service is used by the individual CoreOS machines to form a cluster and as a platform to store globally-accessible data.

Introduction> Introduction # UFW (uncomplicated firewall) is a firewall configuration tool that runs on top of iptables, included by default within Ubuntu distributions. It provides a streamlined interface for configuring common firewall use cases via the command line.

Introduction> Introduction # Most of the time, your main focus will be on getting your cloud applications up and running. As part of your setup and deployment process, it is important to build in robust and thorough security measures for your systems and applications before they are publicly available.

Status: Deprecated> Status: Deprecated # This article covers a version of Ubuntu that is no longer supported. If you are currently operate a server running Ubuntu 12.04, we highly recommend upgrading or migrating to a supported version of Ubuntu:

Introduction> Introduction # UFW, or Uncomplicated Firewall, is an interface to iptables that is geared towards simplifying the process of configuring a firewall. While iptables is a solid and flexible tool, it can be difficult for beginners to learn how to use it to properly configure a firewall.

Status: Deprecated> Status: Deprecated # This article covers a version of Ubuntu that is no longer supported. If you are currently operate a server running Ubuntu 12.04, we highly recommend upgrading or migrating to a supported version of Ubuntu:

Introduction> Introduction # WebDAV is an extension of the HTTP protocol that allows users to manage files on servers. There are many ways to use a WebDAV server. For example, you can share Word or Excel documents with your colleagues by uploading them to your WebDAV server.

Introduction> Introduction # Linux is known for having a great number of mature, useful command line utilities available out of the box in most distributions. Often, system administrators can do much of their work using the built-in tools without having to install additional software.

Introduction> Introduction # An important part of managing server configuration and infrastructure includes maintaining an easy way to look up network interfaces and IP addresses by name, by setting up a proper Domain Name System (DNS).