Practitioner Level

Troubleshooting AWS Network Connectivity: Security Groups and NACLs

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1 hour

2 Learning Objectives

About this Hands-on Lab

Troubleshooting basic network connectivity issues is an important skill. This troubleshooting scenario is an opportunity to assess skills in this area.

Our scenario is this: a junior administrator has deployed a VPC and instances but there are a few things wrong. `Instance3` is not able to connect to the internet and, and the junior admin can’t determine why.

Being a senior administrator, it’s your responsibility to troubleshoot the issue and ensure that the instance has connectivity to the internet, so that you can ping and log into the instance with SSH.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Determine why the instance cannot connect to the internet

Troubleshoot connectivity for Instance3 and resolve the issue.

Identify the second issue preventing the instance from connecting to the internet

Identify and fix the issues that are preventing the instance from connecting to the internet. Once they’re resolved, connect to the instance using SSH to verify connectivity. Use the cloud_user username and the password identified on the lab credentials page to login:

ssh cloud_user@< IPADDRESS >

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Additional Resources

Make sure you are in the us-east-1 region

Based on our scenario, you will need to troubleshoot why Instance3 is not internet accessible. There are issues preventing the instance from connecting to the internet. Your task is to identify and fix those issues, then verify that there is SSH connectivity to the instance.

Need a hint? Check the Hint Video. You can verify your solution watching the Solution Video.

Note: The assigning of the Elastic IP steps have slightly changed. See the lab guide on the assigning of the Elastic IP steps if needed.

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Dedicated Customer Success Manager

Offer applies only to: new personal and business paying customers, existing personal and business customers who switch to an annual paid plan, and any additional annual plan licenses purchased by existing business customers. Offer valid for a limited time only, beginning 10:00AM CT on February 19, 2021. Offer may not be combined with other offers. Purchases are subject to applicable Terms of Use or Master Services Agreement.

Business Basic

$499 / year

Business Plus

$699 / year

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Teams learn from anywhere with unlimited access to certification courses and deep dives on AWS, Azure, GCP, Linux, and so much more.

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Plans & Pricing

Choosing is the first step

Whether you’re an individual learner, a global enterprise, or somewhere in between, we offer several plans so you can choose the one that best fits your needs.

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^$ 0 / month

Limited access to basic courses and features
Rotating selection of limited courses
Stay ahead with weekly cloud roundups
Engage with a vibrant community of learners and experts

Save 20%

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Billed as $379 $303.20 / user yearly

Pay Yearly Pay Monthly

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Full access to our hands-on learning library
Unlimited courses, quizzes, & practice exams
Unlimited Hands-on Labs
Practice in real multi-platform servers

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Personal Plus

^$ 33.27 / month

Billed as $499 $399.20 / user yearly

Everything in Personal Basic, plus:
Full learn-by-doing experience in real AWS, Azure, & GCP environments!
Unlimited access to full Cloud Sandboxes
No account setup or cloud bills

Offer applies only to: new personal and business paying customers, existing personal and business customers who switch to an annual paid plan, and any additional annual plan licenses purchased by existing business customers. Offer valid for a limited time only, beginning 10:00AM CT on February 19, 2021. Offer may not be combined with other offers. Purchases are subject to applicable Terms of Use or Master Services Agreement.

Free

Personal Basic

$379 $303.20 / year

Personal Plus

$499 $399.20 / year

Unlimited Courses

limited

Learn without limits

Learn from anywhere with unlimited access to certification courses and deep dives on AWS, Azure, GCP, Linux, and so much more.

Quizzes

limited

Pop quiz, hot shot

Quickly check your knowledge on a variety of topics and know where to brush up with short quizzes.

ACG Original Series

Keep up with the cloud

Stay up-to-date on all things cloud with weekly and monthly videos about the latest developments in AWS, Azure, GCP, and Kubernetes.

Community Forums

Cloud with friends

Get the help you need, when you need it, from industry experts and other learners in the community — and help others in turn.

Learning Paths

Go from novice to guru in your chose specialty

Not sure how to proceed? We’ll guide you through the exact skills you need to gain to progress from novice to guru across a variety of cloud specialties, including Architect, Security, and DevOps.

ACG Mobile Apps

Keep ACG in your pocket

Learn cloud from anywhere with our mobile apps for iOS and Android.

Mobile Offline Mode

Learn off the grid

No internet connection? No problem. Download courses for offline access with our app for iOS and Android.

Unlimited Hands-on Labs

Get your hands cloudy

Learn by doing with guided labs based on real-world scenarios in a secure, risk-free environment. Build new skills in as little as 15 minutes.

Practice Exams

Put your skills to the test

Prepare for your certs with practice exams that mimic the real thing. Plus, get personalized pointers on how to improve your score.

Interactive Diagrams

Study aids on demand

Snag clickable, PDF versions of core concepts to revisit later. Our diagrams make great study aids, help build retention, and can act as handy cheat sheets for a quick refresher down the road.

Video Transcripts & Captions

For the record

Read along when sound isn’t an option and skip furiously scribbling notes. Our transcripts and captions are also fully searchable, making it easy to find exactly what you’re looking for.

Records of Completion

Achievement unlocked

Earn a little something when you complete courses. Records of completion make it easy to mark and showcase your progress.

Email Support

Cloud on demand

Spin up pre-configured, auto-provisioned servers in just a few clicks. Cloud along with courses, practice whenever you feel like it, and never worry about a surprise cloud bill.

Cloud Playground - Instant Terminal

SSH on demand

Quickly launch a secure, in-browser SSH terminal into any instance on any provider – even behind a firewall.

Cloud Playground - Sandboxes

Personal Plus Only

Learn by doing

Learn by doing with Cloud Playground. Try out new cloud skills in live AWS, Azure, and GCP sandbox environments — without racking up a surprise bill. Cloud along with courses, test an idea at work or prepare for exams.

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Hands-on Labs

Troubleshooting AWS Network Connectivity: Security Groups and NACLs

About this Hands-on Lab

Learning Objectives

Additional Resources

Plans & Pricing

Choosing is the first step

Business Basic

Business Plus

Learning without limits

Learn faster by doing

Take your teams from novice to guru

Cloud on demand

SSH on demand

Learn by doing

Keep up with the cloud

Put skills to the test

Pop quiz, hot shot

Cloud with friends

Keep ACG in your pocket

Learn off the grid

Achievement unlocked

For the record

Study aids on demand

We’re here to help

One dashboard to rule them all

Know where you stand

Get to the cloud faster

Learn better together

Skills at a glance

Easy organization by teams

Invite 10 to 10,000 or more

Connect all the dots

Get your bits

We’ve got your back

We’ll show you the ropes

Plans & Pricing

Choosing is the first step

Free

Personal Basic

Personal Plus

Learn without limits

Pop quiz, hot shot

Keep up with the cloud

Cloud with friends

Go from novice to guru in your chose specialty

Keep ACG in your pocket

Learn off the grid

Get your hands cloudy

Put your skills to the test

Study aids on demand

For the record

Achievement unlocked

We’re here to help

Cloud on demand

SSH on demand

Learn by doing

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