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Course Outline
Linux Router Fundamentals and Planning
- Examining the role of a Linux router in office and laboratory settings
- Gaining insight into WAN, LAN, gateways, and fundamental traffic flow
- Identifying necessary interfaces, packages, and deployment assumptions
- Planning IP addressing schemes, interface roles, and router services
Configuring Network Interfaces with Netplan
- Identifying and validating network interfaces on the Linux host
- Setting up WAN and LAN interfaces using Netplan
- Enabling persistent IP forwarding to facilitate routing
Implementing Routing, NAT, and Basic Firewall Rules
- Understanding packet forwarding and source NAT within a router architecture
- Creating iptables rules for NAT and LAN-to-WAN forwarding
- Permitting 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 appropriate 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
- Utilizing standard Linux tools to inspect routes, rules, interfaces, and services
- Troubleshooting common issues related to forwarding, NAT, and DHCP
- Applying basic operational and security best practices for a router host
Hands-on Build and Review
- Constructing a 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
- Fundamental understanding of TCP/IP networking, including IP addressing, subnetting, and default gateways
- Proficiency in basic Linux command-line administration and experience editing configuration files
- General background in Linux system administration
Target Audience
- Linux system administrators
- Network administrators
- IT support and infrastructure engineers
14 Hours
Testimonials (1)
communication, knowledge from experience, solve problems,
