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Duration 14 hours
Course Outline
Linux Router Fundamentals and Planning
- Examining the role of a Linux router in office and laboratory environments
- Gaining an understanding of WAN, LAN, gateways, and basic traffic flow
- Identifying necessary interfaces, packages, and deployment assumptions
- Planning IP addressing, interface roles, and router services
Configuring Network Interfaces with Netplan
- Identifying and verifying network interfaces on the Linux host
- Configuring WAN and LAN interfaces using netplan
- Enabling persistent IP forwarding for routing
Implementing Routing, NAT, and Basic Firewall Rules
- Understanding packet forwarding and source NAT in a router context
- Creating iptables rules for NAT and LAN-to-WAN forwarding
- Permitting return traffic and basic administrative access
- Persisting 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 leases
- Testing client address allocation and name resolution
Testing, Troubleshooting, and Hardening
- Verifying end-to-end connectivity from LAN clients to the WAN
- Utilising 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 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 behaviour
- Reviewing configuration files and recovery procedures
- Summarising key takeaways and subsequent steps
Requirements
- A solid understanding of basic TCP/IP networking, including IP addressing, subnets, and default gateways
- Familiarity with basic Linux command-line administration and experience in editing configuration files
- General experience with Linux system administration
Target Audience
- Linux system administrators
- Network administrators
- IT support and infrastructure engineers
Custom Corporate Training
Training solutions designed exclusively for businesses.
- Customised Content: We adapt the syllabus and practical exercises to the real goals and needs of your project.
- Flexible Schedule: Dates and times adapted to your team's agenda.
- Format: Online (live), In-company (at your offices), or Hybrid.
Price per private group, online live training, starting from £3200 + VAT*
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