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Course Outline
Fundamentals and Planning for Linux Routers
- Exploring the role of Linux routers in office and lab settings.
- Comprehending WAN, LAN, gateways, and basic traffic flow.
- 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 routing functionality.
Implementing Routing, NAT, and Basic Firewall Rules
- Gaining insight into packet forwarding and source NAT within a router architecture.
- Developing iptables rules to facilitate NAT and LAN-to-WAN forwarding.
- Permitting return traffic and establishing basic administrative access.
- Managing the saving and restoration of firewall rules across system reboots.
Delivering DHCP and Local DNS Services with dnsmasq
\r- Installing and configuring dnsmasq for the LAN segment.
- Specifying DHCP ranges, gateway options, and upstream DNS configurations.
- Binding dnsmasq to the appropriate interface and validating IP leases.
- Testing client address assignment and name resolution processes.
Testing, Troubleshooting, and Hardening
- Verifying end-to-end connectivity from LAN clients to the WAN.
- Employing standard Linux tools to inspect routes, rules, interfaces, and services.
- Diagnosing common issues related to forwarding, NAT, and DHCP.
- Applying fundamental operational and security best practices for router hosts.
Hands-on Construction and Review
- Constructing a functional custom Linux router based on a defined scenario.
- Confirming configuration persistence and service startup behavior.
- Examining configuration files and recovery procedures.
- Summarizing key learnings and outlining 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 background in 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,
