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Course Outline
Linux Router Fundamentals and Planning
- Reviewing the role of a Linux router in office and lab environments.
- Understanding WAN, LAN, gateway, and basic traffic flow.
- Identifying required interfaces, packages, and deployment assumptions.
- Planning IP addressing, interface roles, and router services.
Configuring Network Interfaces with Netplan
- Identifying and validating network interfaces on the Linux host.
- Configuring WAN and LAN interfaces with netplan.
- Enabling persistent IP forwarding for routing.
Implementing Routing, NAT, and Basic Firewall Rules
- Understanding packet forwarding and source NAT in a router setup.
- Creating iptables rules for NAT and LAN-to-WAN forwarding.
- Allowing return traffic and basic administrative access.
- Saving and restoring firewall rules across 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 validating leases.
- Testing client address assignment and name resolution.
Testing, Troubleshooting, and Hardening
- Verifying end-to-end connectivity from LAN clients to the WAN.
- Using common Linux tools to inspect routes, rules, interfaces, and services.
- Troubleshooting common issues with forwarding, NAT, and DHCP.
- Applying basic operational and security good practices for a router host.
Hands-on Build and Review
- Building a working custom Linux router from a defined scenario.
- Validating configuration persistence and service startup behavior.
- Reviewing configuration files and recovery steps.
- Summarizing lessons learned and next steps.
Requirements
- Familiarity with fundamental TCP\/IP networking concepts, including IP addressing, subnets, and default gateways.
- Basic proficiency in Linux command-line administration and experience editing configuration files.
- General experience in Linux system administration.
Audience
- Linux system administrators.
- Network administrators.
- IT support and infrastructure engineers.
14 Hours
Testimonials (2)
communication, knowledge from experience, solve problems,
Marcin Walewski - Intel Technology Poland Sp. z o.o.
Course - OpenStack Bootcamp
The virtual desktop in a browser feature was kind of neat.
