Azure ASG vs NSG: Which One is Right for You?
Azure application security groups and Azure network security groups are both powerful tools used to protect your applications and resources in Azure. However, there are some critical differences between the two that you should be aware of before deciding which one is right for you.
Application security groups are designed to protect applications, while network security groups are designed to protect networks.
Application Security Groups (ASG) are a feature within Azure that helps simplify the management of Network Security Group (NSG) rules. ASGs can be used to group related applications together and manage their security together.
For example, you could create an ASG for all your web applications and another ASG for all your database applications. You can then add NSG rules to the ASGs that apply to all the applications within that group. This makes it easy to manage the security for all your applications at once.
ASGs can also be nested within other ASGs. This allows you to create a more granular level of security for your applications. For example, you could have an ASG for all your web applications and then create a sub-group within that ASG for all your high-security web applications.
- All network interfaces assigned to an application security group must belong to the same virtual network as the first network interface assigned to the application security group is in.
- If you specify an Application Security Group (ASG) as the source and destination in a security rule, Network Interfaces in both ASGs must exist in the same Virtual Network.
To adequately mitigate security risks, you should designate security groups according to their function instead of using individual IP addresses or ranges of IP addresses.