Home labs & practical projects

Review a site-to-site VPN fault systematically

A project to do with your own tools, with guidance on what to create and capture.

Design project Suggested time: 2–3 hoursNo hardware required for the design

What you could create

A fictional branch VPN appears established but business traffic does not pass. The engineer needs to distinguish tunnel establishment from usable connectivity.

Example evidence format

Project evidence map (example)

VPN troubleshooting worksheetScope and inputs

Bidirectional validation planDecisions and reasoning

Evidence record (example)

Evidence	What to capture
VPN troubleshooting worksheet	Show the inputs, scope and decisions behind this record. An established tunnel is not treated as proof of application connectivity.
Bidirectional validation plan	Include the evidence supporting your conclusion. The diagnosis includes the return path and overlapping subnet risk.

What you'll need

Document, spreadsheet or diagram tool

Define two sites, protected subnets, routes and firewall rules. Create sample status output showing an established tunnel and a mismatched traffic selector or route.

Project record

Keep the working files for vpn troubleshooting worksheet and record assumptions as you go.

Current reference material

Use the linked provider resources to verify the features, access terms and version relevant to your project.

Access & cost

No paid platform is needed for the written version. Use a document, spreadsheet or diagram tool you already have.

The organisation and records are fictional. Write down assumptions; do not substitute confidential employer information.

Suggested milestones

1
Plan and investigate
Compare intended traffic with tunnel selectors, routing and policy.
2
Develop your approach
Identify what each status observation proves and does not prove.
3
Verify and explain
Propose a correction and bidirectional tests with a rollback plan.

Evidence worth keeping

Keep clear, organised evidence of your design and any testing you carry out.

1
VPN troubleshooting worksheet
Show the inputs, scope and decisions behind this record. An established tunnel is not treated as proof of application connectivity.
2
Bidirectional validation plan
Include the evidence supporting your conclusion. The diagnosis includes the return path and overlapping subnet risk.

Label design proposals and observed results clearly.

Explain your work

Use these prompts to reflect on your decisions and what you learned.

Which part of your vpn troubleshooting worksheet needed the most judgement?
What observation or assumption changed your approach?
What would you improve, and what have you not verified?

Describe this as a personal project in your portfolio.

Useful resources

Use these resources to deepen your understanding and check key details.

Official certification objectives

Review the current provider requirements and relevant subject areas.

Explore external learning resources

Find relevant providers and check features, access requirements and costs.

A useful starting point

Define two sites, protected subnets, routes and firewall rules. Create sample status output showing an established tunnel and a mismatched traffic selector or route.

What a good result looks like

An established tunnel is not treated as proof of application connectivity.
The diagnosis includes the return path and overlapping subnet risk.

Finish the project

Keep the decision record and note unanswered questions. A written design is not evidence that a technical control has been tested.

Independent home-project guidance, not an official vendor lab or a claim of complete exam coverage. Use your own tools and label the work accurately.