Complete AZ-700 Microsoft Materials

To minimize the risk of SNAT port exhaustion for your 100 virtual machines in subnet4-1, while ensuring minimal administrative effort, you can use an Azure NAT Gateway. This service provides scalable and resilient outbound connectivity for virtual networks, dynamically allocating SNAT ports to avoid exhaustion.

Navigate to the Azure Portal.

Search for “NAT gateways” and select it.

Click on “Create”.

Enter the following details:

Subscription: Select your subscription.

Resource Group: Select an existing resource group or create a new one.

Name: Enter a name for the NAT gateway (e.g., NATGateway-Subnet4-1).

Region: Select the region where your virtual network is located.

Click on “Next: Outbound IP”.

Choose whether to use existing public IP addresses or create new ones.

If creating new ones, click on “Add new” and configure the new public IP addresses.

Click on “Next: Subnet”.

Click on “Associate subnet”.

Select the virtual network that contains subnet4-1.

Select subnet4-1 from the list of subnets.

Click on “OK”.

Review your settings to ensure everything is correct.

Click on “Review + create” and then “Create”.

Azure NAT Gateway: This service provides outbound connectivity for virtual networks, dynamically allocating SNAT ports across all VM instances within a subnet. This dynamic allocation helps prevent SNAT port exhaustion, especially in scenarios with high outbound connection volumes12.

Dynamic SNAT Port Allocation: Unlike static allocation methods, NAT Gateway dynamically allocates SNAT ports based on demand, ensuring efficient use of available ports and reducing the risk of exhaustion2.

Step-by-Step SolutionStep 1: Create a NAT GatewayStep 2: Configure Outbound IP AddressesStep 3: Associate the NAT Gateway with Subnet4-1Step 4: Review and CreateExplanationBy following these steps, you can ensure that your 100 virtual machines in subnet4-1 can make the necessary API calls without running into SNAT port exhaustion, all while minimizing administrative effort.

Here are the steps and explanations for ensuring that requests for wwwjelecloud.com from any of your Azure virtual networks resolve to frontdoor1.azurefd.net:

To use a custom domain with your Azure Front Door, you need to create a CNAME record with your domain provider that points to the Front Door default frontend host. A CNAME record is a type of DNS record that maps a source domain name to a destination domain name1.

To create a CNAME record, you need to sign in to your domain registrar’s website and go to the page for managing DNS settings1.

Create a CNAME record with the following information1:

Source domain name: wwwjelecloud.com

Destination domain name: frontdoor1.azurefd.net

Save your changes and wait for the DNS propagation to take effect1.

To verify the custom domain, you need to go to the Azure portal and select your Front Door profile. Then select Domains under Settings and select Add2.

On the Add a domain page, select Non-Azure validated domain as the Domain type and enter wwwjelecloud.com as the Domain name. Then select Add2.

On the Domains page, select wwwjelecloud.com and select Verify. This will check if the CNAME record is correctly configured2.

Once the domain is verified, you can associate it with your Front Door endpoint. On the Domains page, select wwwjelecloud.com and select Associate endpoint. Then select your Front Door endpoint from the drop-down list and select Associate2.

To ensure that the owner of VNET3 receives an alert whenever an administrative operation is performed on the virtual network, you can set up an Activity Log Alert in Azure Monitor. Here’s how you can do it:

Step-by-Step Solution

Step 1: Create an Activity Log Alert

Navigate to the Azure Portal.

Search for “Monitor” and select it.

In the Monitor blade, select “Alerts” from the left-hand menu.

Click on “New alert rule”.

Step 2: Configure the Alert Rule

Select the Scope:

Click on “Select resource”.

Choose “Virtual Network” as the resource type.

Select VNET3 from the list of virtual networks.

Define the Condition:

Click on “Add condition”.

In the “Signal type” dropdown, select “Activity Log”.

Choose “Administrative” as the category.

Select the specific operations you want to monitor (e.g., Microsoft.Network/virtualNetworks/write for any write operations on the virtual network).

Set the Alert Details:

Enter a name for the alert rule (e.g., VNET3 Admin Operations Alert).

Provide a description if needed.

Configure the Action Group:

Click on “Add action group”.

Enter a name for the action group.

Select the action type (e.g., Email/SMS/Push/Voice).

Enter the details of the recipient (e.g., the email address of the owner of VNET3).

Review and Create:

Review the alert rule settings.

Click on “Create alert rule”.

Explanation

Activity Log Alerts: These alerts notify you when specific operations are performed on your Azure resources. By setting up an alert for administrative operations, you ensure that any changes to VNET3 are promptly reported.

Action Groups: These define the actions to take when an alert is triggered. You can configure notifications via email, SMS, or other methods to ensure the owner of VNET3 is informed immediately.

Administrative Operations: Monitoring these operations helps in tracking changes and maintaining the security and integrity of your virtual network.

By following these steps, you can ensure that the owner of VNET3 receives timely alerts for any administrative operations performed on the virtual network, helping to maintain oversight and security.