My Podman containers on a custom network couldn’t resolve each other by name — even though everything looked correct. After methodically eliminating layers (network config, DNS daemon, container state, firewall), I discovered UFW was silently blocking UDP port 53 on the new podman4 bridge interface. The fix? One ufw allow rule. Here’s how I got…
Category: Networking & Systems Administration
Network Security & Protocols
Linux/Windows Server Administration
VPNs & Remote Work Solutions
Troubleshooting & IT Support
A Practical Guide to AWX: From Setup to Automation
Introduction to AWX AWX is the open source upstream project for Red Hat Ansible Automation Platform, providing a web-based interface, REST API, and task engine for Ansible. It helps teams manage automation at scale with role-based access control, scheduling, and workflow orchestration. 0. AWX Structure Overview 1. Creating an Organization Organizations are the highest level…
Netcat: The TCP/IP Swiss Army Knife Every Admin Should Master
Discover the power of Netcat, the versatile TCP/IP Swiss Army knife that every system administrator should know. This comprehensive guide covers everything from simple chat applications and file transfers to port scanning and banner grabbing. Learn legitimate uses for network debugging, emergency file recovery, and authorized security testing—plus critical security considerations to protect your systems. Master this essential networking tool while understanding its responsible use.
Podman Networking Demystified: When to Use Pods, Networks, or Both
If you’ve transitioned from Docker to Podman, you’ve likely encountered a fundamental question: “How should my containers communicate?” Unlike Docker’s straightforward container-to-container networking, Podman introduces pods—a powerful concept borrowed from Kubernetes that adds both capability and complexity.