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Course Outline
Fundamentals and Planning for Linux Routers
- Exploring the role of a Linux router in office and lab settings.
- Understanding WAN, LAN, gateways, and basic traffic patterns.
- Identifying necessary interfaces, packages, and deployment prerequisites.
- Planning IP addressing schemes, interface roles, and router services.
Configuring Network Interfaces with Netplan
- Locating and verifying network interfaces on the Linux host.
- Setting up WAN and LAN interfaces using Netplan.
- Enabling persistent IP forwarding for proper routing.
Implementing Routing, NAT, and Basic Firewall Rules
- Understanding packet forwarding and source NAT in router configurations.
- Creating iptables rules for NAT and LAN-to-WAN traffic flow.
- Allowing return traffic and basic administrative access.
- Saving and restoring firewall rules 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 correct interface and verifying lease assignments.
- Testing client address assignment and name resolution functionality.
Testing, Troubleshooting, and Hardening
- Verifying end-to-end connectivity from LAN clients to the WAN.
- Using standard Linux tools to inspect routes, rules, interfaces, and services.
- Troubleshooting common issues related to forwarding, NAT, and DHCP.
- Applying essential operational and security best practices for a router host.
Hands-on Build and Review
- Constructing a fully functional custom Linux router based on a defined scenario.
- Validating configuration persistence and service startup behavior.
- Reviewing configuration files and recovery procedures.
- Summarizing key lessons learned and outlining next steps.
Requirements
- Familiarity with fundamental TCP/IP networking concepts, including IP addressing, subnetting, and default gateways.
- Basic proficiency in Linux command-line administration and experience editing configuration files.
- General knowledge of Linux system administration.
Audience
- Linux system administrators.
- Network administrators.
- IT support staff and infrastructure engineers.
14 Hours
Testimonials (1)
communication, knowledge from experience, solve problems,
