Reference:
https://docs.microsoft.com/en-us/azure/application-gateway/end-to-end-ssl-portal
https://docs.microsoft.com/en-us/azure/application-gateway/create-ssl-portal#configuration-tab

See the Explanation below for step by step instructions.
Explanation:
To configure a policy in Azure API Management that can be used by an Azure Application Gateway to protect against known web attack vectors and only allow requests from IP addresses in Canada, follow these steps:
Step-by-Step Solution
Step 1: Create or Access Your API Management Instance
* Navigate to the Azure Portal.
* Search for "API Management services" and select your API Management instance.
Step 2: Configure the Policy
* In the API Management instance, go to the "APIs" section.
* Select the API you want to apply the policy to.
* Go to the "Design" tab.
* Select "All operations" if you want to apply the policy to all operations, or select a specific operation.
Step 3: Add the Inbound Policy
* In the Inbound processing section, click on "+ Add policy".
* Select "IP filter" from the list of policies.
* Add the IP address ranges for Canada. You can find the IP ranges for Canada from a reliable source or use a service that provides this information.
Here is an example of the XML configuration for the policy:
<inbound>
<ip-filter action="allow">
<address-range from="24.0.0.0" to="24.255.255.255" />
<address-range from="47.0.0.0" to="47.255.255.255" />
<!-- Add other Canadian IP ranges as needed -->
</ip-filter>
<ip-filter action="deny">
<address-range from="0.0.0.0" to="255.255.255.255" />
</ip-filter>
</inbound>
* Save the policy to apply the changes.
Explanation:
* IP Filter Policy: This policy allows you to filter incoming requests based on their IP addresses. By specifying the IP ranges for Canada, you ensure that only requests originating from these IPs are allowed.
* Inbound Processing: Applying the policy in the inbound section ensures that the requests are filtered before they reach your API.
By following these steps, you can configure a policy in Azure API Management that restricts access to your API to only those requests originating from IP addresses in Canada, thereby enhancing security and compliance

Explanation:

Reference:
https://docs.microsoft.com/en-us/azure/load-balancer/quickstart-load-balancer-standard-public-portal?
tabs=option-1-create-load-balancer-standard