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Course Outline
Linux Router Architecture and Strategic Planning
- Evaluating the function of Linux-based routers within office and laboratory contexts
- Analyzing Wide Area Network (WAN), Local Area Network (LAN), gateway functions, and fundamental traffic patterns
- Determining necessary network interfaces, software packages, and deployment prerequisites
- Designing IP addressing schemes, defining interface roles, and specifying router services
Network Interface Configuration via Netplan
- Identifying and verifying network interfaces on the Linux host system
- Configuring WAN and LAN connections using netplan
- Establishing persistent IP forwarding to enable routing capabilities
Implementation of Routing, NAT, and Firewall Policies
- Examining packet forwarding mechanisms and source Network Address Translation (NAT) in router deployments
- Formulating iptables rules to facilitate NAT and LAN-to-WAN traffic flow
- Permitting return traffic and establishing foundational administrative access controls
- Maintaining firewall rule persistence across system reboots
DHCP and Local DNS Services via Dnsmasq
- Deploying and configuring dnsmasq for the local network segment
- Specifying DHCP address pools, gateway parameters, and upstream DNS configurations
- Binding dnsmasq to the appropriate interface and validating lease assignments
- Verifying client address allocation and domain name resolution functionality
Operational Testing, Troubleshooting, and Security Hardening
- Confirming end-to-end connectivity between LAN clients and the WAN infrastructure
- Utilizing standard Linux utilities to inspect routing tables, rules, interfaces, and active services
- Resolving common deficiencies related to packet forwarding, NAT, and DHCP operations
- Implementing essential operational and security best practices for router host integrity
Practical Implementation and Review
- Constructing a functional custom Linux router based on defined scenario parameters
- Validating configuration persistence and service initialization procedures
- Reviewing configuration artifacts and established recovery protocols
- Consolidating key insights and outlining subsequent development steps
Requirements
- Comprehensive knowledge of fundamental TCP/IP networking principles, encompassing IP addressing schemes, subnetting configurations, and default gateway operations.
- Familiarity with core Linux command-line interfaces and proficiency in modifying system configuration files.
- Proven background in general Linux system administration tasks.
Target Audience
- Linux system administrators responsible for maintaining operational integrity for government entities.
- Network administrators overseeing infrastructure connectivity.
- IT support personnel and infrastructure engineers managing technical resources.
14 Hours
Testimonials (1)
communication, knowledge from experience, solve problems,
