Firewall

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. Implementing the security measures in this tutorial before deploying your applications will ensure that any software that you run on your infrastructure has a secure base configuration, as opposed to ad-hoc measures that…

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. If you’re looking to get started securing your network, and you’re not sure which tool to use, UFW may be the right choice for you. This tutorial will show you how to set up…

Introduction SSH is the de facto method of connecting to a cloud server. It is durable, and it is extensible — as new encryption standards are developed, they can be used to generate new SSH keys, ensuring that the core protocol remains secure. However, no protocol or software stack is totally foolproof, and SSH being so widely deployed across the internet means that it represents a very predictable attack surface or attack vector through which people can try to gain…

Introduction SSH is the de facto method of connecting to a cloud server. It is durable, and it is extensible — as new encryption standards are developed, they can be used to generate new SSH keys, ensuring that the core protocol remains secure. However, no protocol or software stack is totally foolproof, and SSH being so widely deployed across the internet means that it represents a very predictable attack surface or attack vector through which people can try to gain…

Introduction SSH is the de facto method of connecting to a cloud server. It is durable, and it is extensible — as new encryption standards are developed, they can be used to generate new SSH keys, ensuring that the core protocol remains secure. However, no protocol or software stack is totally foolproof, and SSH being so widely deployed across the internet means that it represents a very predictable attack surface or attack vector through which people can try to gain…

Introduction SSH is the de facto method of connecting to a cloud server. It is durable, and it is extensible — as new encryption standards are developed, they can be used to generate new SSH keys, ensuring that the core protocol remains secure. However, no protocol or software stack is totally foolproof, and SSH being so widely deployed across the internet means that it represents a very predictable attack surface or attack vector through which people can try to gain…

Introduction UFW, or Uncomplicated Firewall, is a simplified firewall management interface that hides the complexity of lower-level packet filtering technologies such as iptables and nftables. If you’re looking to get started securing your network, and you’re not sure which tool to use, UFW may be the right choice for you. This tutorial will show you how to set up a firewall with UFW on Debian 11. Prerequisites To follow this tutorial, you will need one Debian 11 server with a…

Introduction Suricata is a Network Security Monitoring (NSM) tool that uses sets of community created and user defined signatures (also referred to as rules) to examine and process network traffic. Suricata can generate log events, trigger alerts, and drop traffic when it detects suspicious packets or requests to any number of different services running on a server. By default Suricata works as a passive Intrusion Detection System (IDS) to scan for suspicious traffic on a server or network. It will…

Introduction The previous tutorials in this series guided you through installing, configuring, and running Suricata as an Intrusion Detection (IDS) and Intrusion Prevention (IPS) system. You also learned about Suricata rules and how to create your own. In this tutorial you will explore how to integrate Suricata with Elasticsearch, Kibana, and Filebeat to begin creating your own Security Information and Event Management (SIEM) tool using the Elastic stack and Rocky Linux 8. SIEM tools are used to collect, aggregate, store,…