Hi @nilesht ,
Regardless of whether you are using a free account or a paid account you will need to create a DDoS protection plan and enable DDoS protection for your virtual network.
To create a DDoS protection plan
- Select Create a resource in the upper left corner of the Azure portal.
- Search the term DDoS. When DDoS protection plan appears in the search results, select it.
- Select Create.
Enter or select the following values, then select Create:
Then you can follow the steps in this guide for enabling DDoS protection on either a new or existing virtual network.