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Duration 14 hours
Course Outline
Linux Router Fundamentals and Strategic Planning
- Exploring the role of Linux routers in office and laboratory settings.
- Gaining insight into WAN, LAN, gateways, and basic traffic flows.
- Identifying necessary interfaces, required packages, and deployment prerequisites.
- Planning IP addressing schemes, interface roles, and router service configurations.
Configuring Network Interfaces with Netplan
- Identifying and verifying network interfaces on the Linux host.
- Setting up WAN and LAN interfaces using netplan.
- Activating persistent IP forwarding for routing purposes.
Implementing Routing, NAT, and Basic Firewall Rules
- Understanding packet forwarding and source NAT within a router architecture.
- Developing iptables rules for NAT and LAN-to-WAN traffic forwarding.
- Permitting return traffic and basic administrative access.
- Ensuring firewall rules persist across system reboots.
Providing DHCP and Local DNS with dnsmasq
- Installing and configuring dnsmasq for the LAN segment.
- Defining DHCP ranges, gateway options, and upstream DNS settings.
- Binding dnsmasq to the appropriate interface and verifying leases.
- Testing client IP assignment and name resolution capabilities.
Testing, Troubleshooting, and Hardening
- Verifying end-to-end connectivity from LAN clients to the WAN.
- Utilizing standard Linux tools to inspect routes, rules, interfaces, and services.
- Diagnosing and resolving common issues related to forwarding, NAT, and DHCP.
- Implementing essential operational and security best practices for the router host.
Hands-on Build and Review
- Assembling a functional custom Linux router based on a defined scenario.
- Validating configuration persistence and service startup behavior.
- Reviewing configuration files and outlining recovery procedures.
- Summarizing key takeaways and identifying subsequent steps.
Requirements
- A solid understanding of fundamental TCP/IP networking, including IP addressing, subnets, and default gateways.
- Proficiency in basic Linux command-line administration and configuration file editing.
- General experience in Linux system administration.
Target Audience
- Linux system administrators.
- Network administrators.
- IT support and infrastructure engineers.
Testimonials (1)
communication, knowledge from experience, solve problems,
