Cloud NAT for private instances in GCP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Cloud NAT in Google Cloud Platform?

Cloud NAT (Network Address Translation) allows private instances without public IP addresses to access the internet securely by translating their private IPs to a public IP.

beginner

Why do private instances need Cloud NAT to access the internet?

Private instances do not have public IP addresses, so they cannot directly communicate with the internet. Cloud NAT provides a way for them to send outbound traffic by translating their private IPs to public IPs.

intermediate

How does Cloud NAT handle inbound traffic to private instances?

Cloud NAT does not allow inbound connections from the internet to private instances. It only supports outbound connections initiated by the instances.

intermediate

What are the benefits of using Cloud NAT for private instances?

Cloud NAT improves security by keeping instances private, reduces the need for public IPs, and allows controlled outbound internet access without exposing instances directly.

advanced

What is required to configure Cloud NAT for private instances in a VPC?

You need to create a Cloud NAT gateway attached to a Cloud Router in the same region as your private instances, and configure NAT rules to specify which subnets or instances use NAT.

What does Cloud NAT enable for private instances in GCP?

A Assigning public IPs to private instances

B Inbound internet access from any source

C Outbound internet access without public IPs

D Direct connection between VPCs

Cloud NAT allows private instances to send outbound traffic to the internet without needing public IP addresses.

Which component must Cloud NAT be attached to in GCP?

A Cloud SQL Instance

B Compute Engine VM

C Cloud Storage Bucket

D Cloud Router

Cloud NAT is configured on a Cloud Router to manage NAT rules and routing.

Can Cloud NAT be used to allow inbound connections from the internet to private instances?

A No, it only supports outbound connections

B Yes, it allows inbound connections

C Only for specific ports

D Only with firewall rules

Cloud NAT only supports outbound connections initiated by private instances; inbound connections are not allowed.

What is a key security advantage of using Cloud NAT?

A Keeps instances private without public IP exposure

B Allows all traffic from the internet

C Automatically patches instances

D Encrypts all data in transit

Cloud NAT keeps instances private by not assigning public IPs, reducing exposure to internet threats.

Which of the following is NOT required to set up Cloud NAT?

A Cloud Router

B Firewall rule allowing inbound internet traffic

C VPC network with private instances

D Public IP address for NAT gateway

Firewall rules for inbound internet traffic are not required because Cloud NAT does not allow inbound connections.

Explain how Cloud NAT enables private instances to access the internet without public IP addresses.

Think about how your phone uses Wi-Fi but still accesses the internet through your home router.

Describe the steps to configure Cloud NAT for private instances in a Google Cloud VPC.

Consider setting up a middleman device that helps private devices talk to the internet.