Private Link for secure service access in Azure - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Azure Private Link?

Azure Private Link allows you to securely connect to Azure services over a private network, avoiding exposure to the public internet.

beginner

How does Private Link improve security?

It keeps traffic within the Azure network by using private IP addresses, preventing data exposure on the public internet.

intermediate

What is a Private Endpoint in Azure Private Link?

A Private Endpoint is a network interface that connects you privately and securely to a service powered by Private Link.

intermediate

Can Private Link be used to access services across different Azure regions?

Yes, Private Link supports cross-region access, allowing secure connections to services in other Azure regions.

advanced

What is the difference between Private Link and Service Endpoints?

Private Link provides private IP connectivity to services, while Service Endpoints extend your virtual network identity to the service but still use public IP addresses.

What does Azure Private Link use to connect to services securely?

A VPN tunnels over the internet

B Public IP addresses with firewall rules

C Private IP addresses within your virtual network

D Direct internet connections

Azure Private Link uses private IP addresses within your virtual network to keep traffic secure and private.

Which Azure resource represents the private connection to a service in Private Link?

A Private Endpoint

B Network Security Group

C Virtual Network Gateway

D Public IP Address

A Private Endpoint is the network interface that connects privately to the Azure service.

Does Private Link expose your service to the public internet?

A No, it keeps traffic within Azure's private network

B Yes, but with encryption

C Yes, it uses public IPs

D Only during initial setup

Private Link keeps all traffic on Azure's private network, avoiding public internet exposure.

Can Private Link be used to connect to Azure PaaS services?

A Only third-party services

B No, only virtual machines

C Only on-premises services

D Yes, it supports many Azure PaaS services

Private Link supports secure private connections to many Azure PaaS services like Azure Storage and SQL Database.

What is a key benefit of using Private Link over Service Endpoints?

A Service Endpoints are more secure

B Private Link uses private IPs, Service Endpoints use public IPs

C Private Link requires internet access

D Service Endpoints provide private IP connectivity

Private Link provides private IP connectivity, which is more secure than Service Endpoints that use public IPs.

Explain how Azure Private Link helps secure access to Azure services.

Think about how network traffic stays private inside Azure.

Describe the difference between Azure Private Link and Service Endpoints.

Focus on how each method connects your network to Azure services.

Practice

1. What is the main benefit of using Azure Private Link for service access?

easy

A. It allows secure access to Azure services using private IP addresses within your virtual network.

B. It provides public internet access to Azure services with encryption.

C. It automatically scales Azure services based on traffic.

D. It creates a VPN connection between on-premises and Azure.

Solution

1. Step 1: Understand Private Link purpose

   Private Link connects Azure services privately using private IPs inside your virtual network.

2. Step 2: Compare options

   Only It allows secure access to Azure services using private IP addresses within your virtual network. describes private, secure access using private IPs. Others describe different features.

3. Final Answer:

   It allows secure access to Azure services using private IP addresses within your virtual network. -> Option A

4. Quick Check:

   Private Link = Private IP secure access [OK]

Hint: Private Link means private IP inside your network [OK]

Common Mistakes:

• Confusing Private Link with VPN or public internet access
• Thinking Private Link automatically scales services
• Assuming Private Link creates a VPN

2. Which of the following is the correct way to create a Private Endpoint in Azure CLI?

easy

A. az storage account create --name MyPE --resource-group MyRG --location eastus

B. az network vnet create --name MyPE --resource-group MyRG --subnet MySubnet

C. az network private-endpoint create --name MyPE --resource-group MyRG --vnet-name MyVNet --subnet MySubnet --private-connection-resource-id /subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Storage/storageAccounts/mystorage --group-ids blob

D. az network private-link create --name MyPE --resource-group MyRG

Solution

1. Step 1: Identify Private Endpoint creation command

   The correct Azure CLI command to create a Private Endpoint is az network private-endpoint create with required parameters.

2. Step 2: Verify parameters

   az network private-endpoint create --name MyPE --resource-group MyRG --vnet-name MyVNet --subnet MySubnet --private-connection-resource-id /subscriptions/xxx/resourceGroups/xxx/providers/Microsoft.Storage/storageAccounts/mystorage --group-ids blob uses correct command and parameters including resource ID and group IDs for the service.

3. Final Answer:

   az network private-endpoint create with proper parameters -> Option C

4. Quick Check:

   Private Endpoint creation uses az network private-endpoint create [OK]

Hint: Private Endpoint uses 'az network private-endpoint create' command [OK]

Common Mistakes:

• Using vnet create instead of private-endpoint create
• Confusing storage account creation with Private Endpoint
• Using non-existent 'private-link create' command

3. Given this Azure CLI command output snippet for a Private Endpoint:

{
  "privateLinkServiceConnections": [
    {
      "name": "connection1",
      "privateLinkServiceId": "/subscriptions/abc/resourceGroups/rg1/providers/Microsoft.Network/privateLinkServices/pls1",
      "status": "Approved"
    }
  ]
}

What does the status "Approved" indicate?

medium

A. The Private Endpoint connection request is pending approval.

B. The Private Endpoint is deleted.

C. The Private Endpoint connection request was rejected.

D. The Private Endpoint connection request has been accepted and is active.

Solution

1. Step 1: Understand status field meaning

   The status "Approved" means the connection request was accepted and is active.

2. Step 2: Eliminate other options

   "Pending" means waiting, "Rejected" means denied, "Deleted" means removed. Only "Approved" means active connection.

3. Final Answer:

   The Private Endpoint connection request has been accepted and is active. -> Option D

4. Quick Check:

   Status Approved = Active connection [OK]

Hint: Approved status means connection is active [OK]

Common Mistakes:

• Confusing Approved with Pending or Rejected
• Assuming Approved means deleted or inactive
• Ignoring the status field meaning

4. You created a Private Endpoint but cannot access the Azure Storage account privately. Which of the following is a likely misconfiguration?

medium

A. The Private Endpoint subnet does not have network policies disabled for Private Link.

B. The Storage account is in the same region as the Private Endpoint.

C. The Private Endpoint has a valid approved connection status.

D. The virtual network has enough IP addresses.

Solution

1. Step 1: Check Private Endpoint subnet network policies

   For Private Link to work, the subnet must have network policies disabled to allow private IP traffic.

2. Step 2: Analyze other options

   Same region is normal, approved status is good, and enough IPs is required but less likely cause of access failure.

3. Final Answer:

   The Private Endpoint subnet does not have network policies disabled for Private Link. -> Option A

4. Quick Check:

   Subnet network policies must be disabled for Private Link [OK]

Hint: Disable subnet network policies for Private Link [OK]

Common Mistakes:

• Ignoring subnet network policies setting
• Assuming region mismatch causes access failure
• Overlooking connection status correctness

5. You want to securely connect your on-premises network to an Azure SQL Database using Private Link. Which combination of Azure components should you configure to achieve this?

hard

A. Create a Public Endpoint for Azure SQL Database and use firewall rules to restrict IPs.

B. Create a Private Endpoint for the Azure SQL Database in a virtual network, then connect your on-premises network to that virtual network via VPN or ExpressRoute.

C. Use Azure Bastion to connect to the Azure SQL Database securely.

D. Create a Virtual Network Gateway and connect directly to the Azure SQL Database without Private Endpoint.

Solution

1. Step 1: Understand Private Link for on-premises access

   Private Link requires a Private Endpoint in a virtual network to provide private IP access to Azure SQL Database.

2. Step 2: Connect on-premises to Azure VNet

   To access the Private Endpoint from on-premises, you must connect your on-premises network to the Azure virtual network using VPN or ExpressRoute.

3. Step 3: Evaluate other options

   Public Endpoint with firewall is less secure, Azure Bastion is for VM access, and Virtual Network Gateway alone doesn't provide Private Link.

4. Final Answer:

   Create a Private Endpoint for the Azure SQL Database in a virtual network, then connect your on-premises network to that virtual network via VPN or ExpressRoute. -> Option B

5. Quick Check:

   Private Endpoint + VPN/ExpressRoute = Secure on-premises access [OK]

Hint: Private Endpoint plus VPN/ExpressRoute connects on-premises securely [OK]

Common Mistakes:

• Using public endpoints instead of Private Link for security
• Confusing Azure Bastion with Private Link usage
• Assuming Virtual Network Gateway alone provides Private Link