Monitoring TLS Certificates with Uptime Kuma

In the realm of DevOps, ensuring the availability and security of your services is paramount. One critical aspect of this is monitoring TLS (Transport Layer Security) certificates, which are essential for securing communications over networks. Expired or misconfigured certificates can lead to service disruptions and security vulnerabilities. Uptime Kuma, an open-source monitoring tool, offers a straightforward way to keep an eye on your TLS certificates. In this article, we’ll explore how to set up and use Uptime Kuma for TLS certificate monitoring.

How to Check DNS Propagation Using Online Services

DNS propagation is a crucial aspect of managing web services and domains. When you make changes to your DNS records, such as updating an A record or changing your nameservers, these changes need to propagate across the internet. This process can take anywhere from a few minutes to 48 hours, depending on various factors like TTL (Time to Live) settings and the caching behavior of DNS servers worldwide. Understanding and checking DNS propagation is essential for ensuring that your changes have been successfully applied and are visible to users globally.

How to Check DNS Propagation Using CLI

DNS propagation is a critical aspect of managing domain names and ensuring that changes to DNS records are reflected across the internet. When you update DNS records, it can take some time for these changes to propagate to all DNS servers worldwide. As a DevOps engineer, it’s essential to verify DNS propagation to ensure that your services are accessible and functioning correctly. In this article, we’ll explore how to check DNS propagation using command-line interface (CLI) tools, focusing on open-source solutions.

Using Nginx-Proxy in Your Homelab: A Comprehensive Guide

In the world of self-hosting and homelabs, managing multiple web services can become a complex task. This is where a reverse proxy like Nginx comes into play. Nginx-proxy, an automated reverse proxy for Docker containers, simplifies the process of managing and routing traffic to your various services. In this article, we’ll explore how to set up and use nginx-proxy in your homelab environment. What is Nginx-Proxy? Nginx-proxy is a Docker container that automatically configures itself to act as a reverse proxy for other Docker containers.

Using OpenSSL CLI to Check Information About Website TLS Certificates

In the realm of DevOps and IT security, ensuring that your web applications are secure is paramount. One of the fundamental aspects of web security is the use of TLS (Transport Layer Security) certificates, which encrypt data between the client and server, ensuring privacy and data integrity. OpenSSL, a robust open-source toolkit, provides a command-line interface (CLI) that allows you to inspect and verify TLS certificates with ease. This article will guide you through using OpenSSL CLI to check information about a website’s TLS certificate.

**The Evolution of SSL and TLS Protocols: A Journey Through Secure Communication**

The Secure Sockets Layer (SSL) and its successor, Transport Layer Security (TLS), are cryptographic protocols designed to provide secure communication over a computer network. These protocols have become a cornerstone of internet security, ensuring that data transmitted between clients and servers remains confidential and tamper-proof. This article delves into the history of SSL and TLS, exploring their development, evolution, and significance in the digital age. The Birth of SSL The journey of SSL began in the early 1990s when the internet was rapidly expanding, and the need for secure online transactions became apparent.

Replacing the netstat Command with ss: A Modern Approach to Network Monitoring

In the world of network monitoring and troubleshooting, the netstat command has long been a staple for system administrators and DevOps engineers. However, as technology evolves, so do the tools we use. Enter ss, a modern alternative to netstat that offers more features, better performance, and a more user-friendly experience. In this article, we’ll explore why you should consider replacing netstat with ss and how to effectively use ss for your network monitoring needs.

The History of SSL and TLS Protocols

The Secure Sockets Layer (SSL) and its successor, the Transport Layer Security (TLS), are cryptographic protocols that ensure secure communication over a computer network. Their evolution reflects the ongoing need for secure online transactions and data transmission. This article provides a brief history of SSL and TLS, detailing their development and the reasons behind the transitions between various protocol versions. Origins of SSL SSL 1.0 (1994): SSL was developed by Netscape in the early 1990s to secure sensitive data transmitted over the internet.

Docker Networking: Best Practices for Isolating and Securing Containers

As organizations increasingly adopt containerization for application development and deployment, understanding Docker networking has become vital for ensuring application performance and security. Docker provides various networking options that can help isolate and secure containers, allowing developers and operations teams to build robust systems with minimized risk exposure. This article outlines best practices for managing Docker networking, focusing on isolation and security. Understanding Docker Networking Modes Before we delve into best practices, it’s essential to familiarize ourselves with the different networking modes that Docker provides: