How to Install and Configure Zabbix on Ubuntu 20.04

Posted on February 26, 2021 by Dean Conally
Category: Tutorials | Tags: Account Management, Apache, Database, Database Zabbix, Firewall, Linux, Linux Server, Load, management, MariaDB, MariaDB Client, Monitoring, MySQL, PHP, PHP 7.2, Processes, Server, SSH, Tools, Top, Ubuntu, Ubuntu 20.04, UFW, UFW Firewall, Zabbix, Zabbix Administrator, Zabbix Agent, Zabbix Frontend, Zabbix Release, ZCat

Reading Time: 5 minutes

Introduction

Zabbix is an open-sourced tool used to monitor various IT components such as servers and hardware that they are running, cloud services, whole networks, etc. Zabbix can monitor the network health and integrity of your servers. All monitoring can be done through Zabbix’s web-based frontend. This means that you can quickly check the status of your servers from anywhere! This article describes how to install the Zabbix monitoring tool, create a database, and configure the frontend on Ubuntu 20.04.

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Intrusion Detection Systems: Behind the Firewall

Posted on February 23, 2021 by David Singer
Category: Tutorials | Tags: Audit, Authentication, Code Injection, Common Questions, Compliance, Compromise, Compromised Website, Content Security Policy, Data Leak, Encryption, Fail2Ban, File Permissions, Firewall, Google Authenticator, Hacking, HIPAA, Least Privilege, Linux, LUKS, Lynis, Malware, Passphrase, Password, Password Policy, PCI, PCI Compliant, Pen testing, Permissions, Remote Code Execution, Root, Security, Security Policy, Security Practices, SELinux, Server, SSH, SSH Keys, SSH Ports, SSL, Tools, VPN, Vulnerability

Reading Time: 4 minutes

What is an Intrusion Detection System?

An intrusion detection system (or IDS) is a hardware device or software program that observers a network or system for security policy violations or malicious activity. Typically, any activity or intrusion violation is reported to either an administrator or is collected and logged in a central location using a security information and event management system (or SIEM) system. This system is a security-based technology developed initially for detecting exploits and vulnerabilities used against a computer or other target applications.

IDS systems are usually a passive system that monitors and reports issues that need to be investigated. This product differs from an Intrusion Prevention System (or IPS) in the sense that an IPS assumes an active role by monitoring and defending the system against threats. If a prospective danger is seen, the IPS quickly takes action to prevent any detected exploits from occupying and seizing the system.

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How to Troubleshoot SMTP Errors: Part 2

Posted on February 22, 2021 by David Singer | Updated: February 23, 2021
Category: Tutorials | Tags: Account Management, Command-line, Common Questions, cPanel, Email, Email Hosting, Email Setup, Export, Forwarders, Hosted Exchange, IMAP, Import, iOS, iPad, iPhone, Linux, Linux Services, Mac Mail, Network, Outlook, Plesk, POP3, Port, Ports, Postbox, Premium Business Email, Qmail, Server, Setup, SMTP, System, Telnet, Thunderbird, Webmail, WHM

Reading Time: 10 minutes

In part one of How to Troubleshoot SMTP Errors, we reviewed email status codes, internal reasons for email issues, and troubleshooting steps to address those issues. In part two of this series, we will examine some of the external reasons for email issues.

External Reasons for Email Issues

After we have tested the local server and see the local server is working correctly, we can infer that the issue lies with one of the following external problems:

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How to Troubleshoot SMTP Errors: Part 1

Posted on February 19, 2021 by David Singer
Category: Tutorials | Tags: Account Management, Command-line, Common Questions, cPanel, Email, Email Hosting, Email Setup, Export, Forwarders, Hosted Exchange, IMAP, Import, iOS, iPad, iPhone, Linux, Linux Services, Mac Mail, Network, Outlook, Plesk, POP3, Port, Ports, Postbox, Premium Business Email, Qmail, Server, Setup, SMTP, System, Telnet, Thunderbird, Webmail, WHM

Reading Time: 8 minutes

What is SMTP?

The Simple Mail Transfer Protocol (SMTP) is a communication protocol used to transmit email between corresponding email servers. Using an email client like Mac Mail, Outlook, Thunderbird, or web clients like Gmail or Windows Live, SMTP can send messages to an email server. Although SMTP was initially designed as an email transport and delivery system, it later encompassed the email submission protocols that are now in use by both the Post Office Protocol (POP) and the Internet Message Access Protocol (IMAP). The above-noted email clients use these protocols to retrieve email from an email server. When this system fails, it provides the means to identify and resolve SMTP errors.

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How to Use Linux Pipe for Redirection

Posted on February 17, 2021 by Matthew Stevens
Category: Tutorials | Tags: CLI, Command, Command Line, Command Line Interface, Command-line, Commands, Input, Linux, Linux Commands, Named Pipes, Output, Persistent Objects, Pipe, Pipe Command, Pipe Redirection, Redirect, Redirection, Stdin, Stdout, Unnamed Pipes

Reading Time: 4 minutes

A pipe is a form of redirection in Linux used to connect the STDOUT of one command into the STDIN of a second command. It allows us to narrow the output of a string of commands until we have an easily digestible amount of data. The pipe character is the | symbol and is placed between any two commands. Pipes are one of the most used command-line features that Linux has. Every article showing Linux commands will almost inevitably include pipes.

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How to Stop Outgoing Email Spam

Posted on February 11, 2021 by Danielle Vult
Category: Tutorials | Tags: Account Management, Common Questions, cPanel, Disable, Email, Email Hosting, Email Setup, Email Sync, Exim, Filter, IMAP, InterWorx, Junk, Linux, Mail, Mail Client, Mail Delivery, Mail Queue Manager, POP3, Qmail, SMTP, Spam, SpamAssassin, Spamming, SSL, Troubleshooting, WHM

Reading Time: 8 minutes

Introduction

The most effective method to protect a server from sending spam is to prevent it in the first place. In this article, we provide several techniques to use to keep the server from sending out unwanted spam or junk mail. Typically, unwanted, and unsolicited spam email is usually bulk sent out to an indiscriminate list of recipients. Spam is often used for commercial purposes but can be sent out in massive volume by a botnet or a network of infected computers.

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How to Store Secrets in Kubernetes

Posted on February 9, 2021 by David Singer
Category: Tutorials | Tags: API, Automation, Cloud, Cluster, Clusterroles, Clusters, Container, Containerization, Containerized Software, Continuous Deployment, Continuous Integration, Deployment, Developer, Development, DevOps, Docker, Docker Image, Environment, Hypervisor, K3s, k8s namespaces, Kubectl, Kubernetes, Linux, LXC, Open Source, OpenVZ, Permission, Permissions, Platform, RBAC, Resource, Role-Based, Rolebinding, Roles, Security, System, User Management, Virtual Machines, Virtualization

Reading Time: 5 minutes

What is a Secret?

A Kubernetes Secret is an object that enables us to store and manage sensitive information. A Secret can contain data like SSH keys, OAuth data, or other user authentication information like passwords. It is typically stored within a cluster in a manner native to Kubernetes. Using a Secret object provides more granular control over how highly sensitive data is used. It also lowers the risk of data exposure to unauthorized parties.

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How To Use the Find Command In Linux

Posted on February 5, 2021 by Misael Ramirez | Updated: February 9, 2021
Category: Tutorials | Tags: CLI, Command Line, Command-line, Commands, Find, IP, IPv4, Linux, Linux Commands, Private, public, SSH, Toolkit, Tools

Reading Time: 6 minutes

One of the most popular command-line utilities is the find command, mainly because of its simplicity and versatility. It’s the default option to search for files across multiple UNIX based systems with a wide range of parameters and variables to narrow down our searches. It helps look for files matching a specific name, date, size, or even owner to provide a frame to append other commands to the list of files found. The basic structure of the find command is as follows.

find [parameters] [path] [search patterns]

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What is Blockchain? A Tutorial

Posted on February 4, 2021 by David Singer
Category: Tutorials | Tags: Audit, Authentication, Big Data, Block, Blockchain, Blocks, Chain, Compliance, Compromise, Content Security, Content Security Policy, Cryptographic Functions, Cryptographic Hash Function, Cryptography, Data Integrity, Data Management, Data Security, Decentralized, Decryption, Encryption, Fintech, Hard Fork, Hash, HIPAA, Least Privilege, Ledger, Linux, Mining, Node, Nodes, PCI, PCI Compliant, Peer to Peer, Permissions, Privacy, Security, Security Policy, Security Practices, Solution, Transaction, Vulnerability, Zero Trust

Reading Time: 9 minutes

The idea of blockchain itself may sound complicated, but the premise is simple. Blockchain is a zero-trust, fully decentralized peer-to-peer data storage system that spreads verified information across participants in the chain, referred to as nodes. Blockchain stores this information in blocks that are chained together. As new data arrives, it is recorded into a block. Once a block has been filled with information, it is linked to the previous block. This process allows the data to be bound together in sequential and chronological order.

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How to Install and Configure KubeKey

Posted on February 3, 2021 by David Singer | Updated: February 4, 2021
Category: Tutorials | Tags: API, Automation, Binding, Cloud, Cluster, Clusterroles, Clusters, Container, Containerization, Containerized Software, Continuous Deployment, Continuous Integration, Deployment, Developer, Development, DevOps, Docker, Docker Image, Environment, Hypervisor, K3s, K8s, k8s namespaces, Kubectl, Kubernetes, Linux, namespaces, OCI, Open Container Initiative, Open Source, Platform, RBAC, Security, System, User Management, Virtualization, Virtualization Access

Reading Time: 5 minutes

What is KubeKey?

KubeKey is the newest Kubernetes installer for KubeSphere. KubeSphere is a distributed OS management system for cloud-native applications using Kubernetes as its kernel. It provides a plug-and-play structure for seamless integration of many third-party applications. It is somewhat similar in nature to MiniKube for installing Kubernetes.

KubeKey was developed using the Go programming language. It provides a quick method to install Kubernetes and any additional add-ons using Chart or YAML files. KubeKey uses the kubeadm application to install a Kubernetes cluster on multiple nodes in a synchronous manner to reduce the complexity of the installation and improve efficiency. Using KubeKey reduces installation time considerably compared to many other installation techniques.

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Tag: Linux

How to Install and Configure Zabbix on Ubuntu 20.04

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