Hardening SSH: Fail2Ban, Nftables & Cloud Firewalls
Defense in depth for SSH with Fail2Ban, nftables, and the cloud provider Cloud Firewalls. Harden Ubuntu and block brute-force attacks via a bastion.
Настройка BIND в качестве DNS-сервера частной сети на базе Ubuntu 18.04
Важным элементом управления конфигурацией и инфраструктурой сервера является поддержание удобного способа просмотра сетевых интерфейсов и IP-адресов по имени с помощью настройки корректной системы доменных имен (DNS). Использование полных доменных имен (FQDN), а не IP-адреса, для…
How To Create a High-Availability Setup with Heartbeat and Reserved IPs on Ubuntu
Heartbeat is an open source program that provides cluster infrastructure capabilities—cluster membership and messaging—to client servers, which is a critical component in a high availability (HA) server infrastructure. Heartbeat is typically used in conjunction with a cluster resource manager (CRM), such as Pacemaker, to achieve a complete HA setup. However, in this tutorial, we will demonstrate how to create a 2-node HA server setup by simply using Heartbeat and a the cloud provider Reserved IP.
Инспектирование сетевых компонентов Kubernetes
Kubernetes — это система организации контейнеров, способная управлять контейнерными приложениями в кластере серверных узлов. Для обеспечения доступа к сети для всех контейнеров в кластере требуются сложные схемы сетевых подключений. В этой статье мы кратко расскажем о некоторых…
How To Install Tinc and Set Up a Basic VPN on Ubuntu 14.04
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. We will also demonstrate how to use Tinc to set up a secure tunnel into a private network. We will be using Ubuntu 14.04 servers, but the configurations can be adapted for use with any other OS.
How To Mirror Local and Remote Directories on a VPS with lsyncd
While administrating web and application servers, there are many times when it is useful to mirror directories. The lsyncd service can mirror local and remote directories in order to propagate changes from one location to another. This guide will cover the basic usage of this tool.
Einrichten einer Firewall mit UFW unter Ubuntu 20.04
UFW (oder Uncomplicated Firewall) ist eine vereinfachte Firewall-Verwaltungsschnittstelle, die die Komplexität von Paketfilterungstechnologie auf niedriger Ebene wie iptables und nftables versteckt. Wenn Sie mit dem Sichern Ihres Netzwerks beginnen möchten und Sie nicht…
How To Set Up an NFS Mount on Ubuntu 14.04
NFS is a remote file system protocol that allows you to mount remote shares on your local machine. In this guide, we will demonstrate how to use NFS on two Ubuntu 14.04 servers.
How To Set Up DNSSEC on an NSD Nameserver on Ubuntu 14.04
Serve secure zone files on a pair of NSD nameservers using DNSSEC. This tutorial shows you how to set up master and slave nameservers, and how to serve secure zone files for two domains.
Verwenden von SSH zum Herstellen einer Verbindung mit einem Remoteserver
SSH ist ein wichtiges Tool für die Verwaltung von Remote-Linux-Servern. In diesem Leitfaden diskutieren wir die grundlegende Verwendung dieses Dienstprogramms und die Konfiguration Ihrer SSH-Umgebung.
