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Hands-on Network Debugging & SSH Access

14 Inputs
2 Hours
Beginner
scenario poster
Industry
general
Skills
approach
quality
network-management
Tools
bash

Learning Objectives

Investigate Network Configuration Issues
Identify network interfaces, IPv4 addresses, subnet masks, and gateways
Diagnose DNS and Network Activity
Analyze network statistics to detect congestion or dropped packets
Use an SSH key (.pem file) to connect securely to a remote server

Overview

At GlobalNet Solutions, a critical Apache server has become inaccessible via its hostname, disrupting web services and ongoing deployments. As a DevOps engineer, your responsibility is to systematically diagnose and restore connectivity by investigating network configurations, DNS resolution, and secure server access via SSH.

This hands-on scenario will guide you through essential network troubleshooting techniques, covering network configurations, DNS resolution, and SSH connectivity, which are crucial for maintaining server accessibility and minimizing downtime.

Prerequisites

  • Basic Linux command-line skills (e.g., ls, cd, ping, netstat, dig, etc.)
  • Familiarity with networking concepts (IP addresses, subnet masks, DNS, and routing)
  • Understanding of SSH authentication (public-private key pairs and .pem files)
  • Access to a Linux-based system or cloud environment to practice commands