What is NSG rule?

An NSG group is nothing by a security group in Azure portal.

A network security group (NSG) contains a list of security rules that allow or deny network traffic to resources connected to Azure Virtual Networks (VNet). NSGs can be associated to subnets, individual VMs (classic), or individual network interfaces (NIC) attached to VMs (Resource Manager).

How do I add an NSG rule in Azure?

Create a basic "Allow" NSG rule with the highest priority. Create a "Deny" rule over TCP for a specific IP address range with the lowest priority. az network nsg rule create -g MyResourceGroup --nsg-name MyNsg -n MyNsgRule --priority 4096 \ --source-address-prefixes 208.130.

How many default rules are created in a NSG?

You must add rules to them (inbound or outbound), and they must be associated to have the desired effect of filtering traffic based on those rules. Remember that NSGs with no rules will have the six default rules covered earlier in this section.

What is priority in Azure NSG?

A unique name within the network security group. A number between 100 and 4096. Rules are processed in priority order, with lower numbers processed before higher numbers, because lower numbers have higher priority. Once traffic matches a rule, processing stops.

Is NSG stateful?

The NSGs in Azure are Stateful.  Meaning that if you open an incoming port, the outgoing port will be open automatically to allow the traffic. The default rules in a Network Security Group allow for outbound access and inbound access is denied by default.

What is azure ASG?

Azure Application Security Groups (ASG) are a new feature, currently in Preview, that allows for configuring network security using an application-centric approach within Network Security Groups (NSG).  They work by assigning the network interfaces of virtual machines, as members of the ASG.

Is Azure NSG a firewall?

An NSG is a firewall, albeit a very basic one. It's a software defined solution that filters traffic at the Network layer. However, Azure Firewall is more robust. It's a managed firewall service that can filter and analyze L3-L4 traffic, as well as L7 application traffic

What is nic in Azure?

A network interface enables an Azure Virtual Machine to communicate with internet, Azure, and on-premises resources. ... You may instead choose to create network interfaces with custom settings and add one or more network interfaces to a virtual machine when you create it.

How can I change my NSG in Azure?

Change an application security group

1. Go to the Azure portal to view an application security group. Search for and select Application security groups.
2. Select the name of the application security group that you want to change.
3. Select change next to the setting that you want to modify.