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Duration 14 hours
Course Outline
Linux Router Fundamentals and Strategic Planning
- Exploring the function of a Linux router within office and laboratory settings
- Comprehending WAN, LAN, gateway structures, and fundamental traffic pathways
- Determining necessary interfaces, software packages, and deployment prerequisites
- Designing IP addressing schemes, interface roles, and router service architectures
Configuring Network Interfaces via Netplan
- Detecting and verifying network interfaces on the Linux host
- Setting up WAN and LAN interfaces using netplan
- Activating persistent IP forwarding for routing operations
Establishing Routing, NAT, and Fundamental Firewall Rules
- Analyzing packet forwarding and source NAT mechanisms in a router context
- Developing iptables rules for NAT and LAN-to-WAN packet forwarding
- Permitting return traffic and essential administrative access
- Ensuring firewall rules persist across system reboots
Delivering DHCP and Local DNS Services with dnsmasq
- Installing and adjusting dnsmasq for the LAN segment
- Specifying DHCP ranges, gateway options, and upstream DNS parameters
- Associating dnsmasq with the appropriate interface and verifying lease assignments
- Testing client IP address allocation and domain name resolution
Validation, Troubleshooting, and Security Hardening
- Confirming end-to-end connectivity from LAN clients to the WAN
- Utilizing standard Linux utilities to examine routes, rules, interfaces, and services
- Diagnosing typical issues related to forwarding, NAT, and DHCP
- Implementing basic operational and security best practices for the router host
Practical Build and Evaluation
- Assembling a functional custom Linux router based on a defined scenario
- Verifying configuration persistence and service startup behaviors
- Examining configuration files and documenting recovery procedures
- Consolidating key takeaways and identifying subsequent steps
Requirements
- Familiarity with fundamental TCP/IP networking concepts, such as IP addressing, subnetting, and default gateway configuration
- Proficiency in basic Linux command-line administration and the modification of configuration files
- General background in Linux system administration
Intended Audience
- Linux System Administrators
- Network Administrators
- IT Support and Infrastructure Engineers
Testimonials (1)
communication, knowledge from experience, solve problems,
