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Event Information

  1. The Microsoft.Network.virtualNetworks.delete event in Azure for AzureNetwork indicates that a virtual network (VNet) has been deleted in the Azure Network resource group.
  2. This event signifies that all associated resources within the VNet, such as subnets, network security groups, and route tables, have also been removed.
  3. It is important to note that this event can have significant implications on any resources or services that were relying on the deleted VNet for connectivity, and appropriate measures should be taken to ensure the continuity of network connectivity.

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Examples

  1. Unauthorized deletion: If security is impacted with Microsoft.Network.virtualNetworks.delete in Azure for AzureNetwork, it could potentially lead to unauthorized deletion of virtual networks. This could result in the loss of network connectivity for resources within the virtual network, impacting the availability of applications and services.

  2. Data exposure: Deleting a virtual network without proper safeguards in place can lead to data exposure. If the virtual network contains sensitive data or resources, unauthorized deletion could result in the exposure of this data to unauthorized individuals or entities.

  3. Network misconfiguration: Deleting a virtual network without proper planning and documentation can lead to network misconfiguration. This can result in the loss of network connectivity, misrouting of traffic, and potential security vulnerabilities. It is important to ensure that proper backup and recovery mechanisms are in place to mitigate the impact of accidental or unauthorized deletions.

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Remediation

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Using Console

To remediate the issues mentioned in the previous response for Azure Network using the Azure console, you can follow these step-by-step instructions:

  1. Enable Network Security Groups (NSGs):

    • Go to the Azure portal and navigate to the desired virtual network.
    • Select “Network security groups” from the left-hand menu.
    • Click on “Add” to create a new NSG or select an existing NSG.
    • Configure inbound and outbound security rules based on your requirements.
    • Apply the NSG to the desired subnets or network interfaces.

  2. Implement Azure DDoS Protection Standard:

    • Go to the Azure portal and navigate to the desired virtual network.
    • Select “Distributed denial of service (DDoS) protection” from the left-hand menu.
    • Click on “Enable DDoS protection” and choose the “Standard” tier.
    • Configure the DDoS protection settings based on your requirements.
    • Apply the DDoS protection to the desired resources within the virtual network.

  3. Implement Azure Firewall:

    • Go to the Azure portal and navigate to the desired virtual network.
    • Select “Firewalls and virtual networks” from the left-hand menu.
    • Click on “Add” to create a new Azure Firewall or select an existing one.
    • Configure the firewall rules and network rules based on your requirements.
    • Associate the Azure Firewall with the desired subnets or network interfaces.

Note: The above instructions provide a general overview of the steps involved in remediating the mentioned issues using the Azure console. The specific configuration and settings may vary based on your specific requirements and the Azure portal interface may change over time. It is recommended to refer to the official Azure documentation for detailed and up-to-date instructions.

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Using CLI

To remediate issues related to Azure Network using Azure CLI, you can use the following commands:

  1. Example 1: Enable Network Security Group (NSG) Flow Logs

    • Command: az network watcher flow-log configure
    • Description: This command enables flow logs for a specific NSG, allowing you to capture and analyze network traffic.
    • Parameters: You need to provide the resource group name, NSG name, storage account ID, and storage account key.

  2. Example 2: Restrict Network Access using Network Security Groups (NSGs)

    • Command: az network nsg rule create
    • Description: This command creates a new rule in an NSG to restrict network access based on specific criteria.
    • Parameters: You need to provide the resource group name, NSG name, rule name, priority, source/destination IP addresses, ports, and action.

  3. Example 3: Enable Azure DDoS Protection Standard

    • Command: az network ddos-protection update
    • Description: This command enables Azure DDoS Protection Standard for a specific virtual network, providing protection against DDoS attacks.
    • Parameters: You need to provide the resource group name and virtual network name.

Please note that the actual CLI commands may vary depending on your specific requirements and configurations. Make sure to refer to the Azure CLI documentation for detailed usage and options.

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Using Python

To remediate issues related to AzureNetwork using Python, you can use the Azure SDK for Python. Here are three examples of how you can remediate common issues:

  1. Example 1: Enable Network Security Group (NSG) Flow Logs

    • Use the azure.mgmt.network package to retrieve the NSG resource.
    • Enable flow logs for the NSG by setting the enable_flow_logs property to True.
    • Update the NSG resource using the network_client.network_security_groups.create_or_update method.
    from azure.identity import DefaultAzureCredential
from azure.mgmt.network import NetworkManagementClient

# Authenticate using default credentials
credential = DefaultAzureCredential()
network_client = NetworkManagementClient(credential, subscription_id)

# Retrieve the NSG resource
nsg = network_client.network_security_groups.get(resource_group_name, nsg_name)

# Enable flow logs for the NSG
nsg.enable_flow_logs = True

# Update the NSG resource
network_client.network_security_groups.create_or_update(resource_group_name, nsg_name, nsg)

  2. Example 2: Add a Network Security Rule to an NSG

    • Use the azure.mgmt.network package to retrieve the NSG resource.
    • Add a new security rule to the NSG by appending it to the security_rules list.
    • Update the NSG resource using the network_client.network_security_groups.create_or_update method.
    from azure.identity import DefaultAzureCredential
from azure.mgmt.network import NetworkManagementClient
from azure.mgmt.network.models import SecurityRule

# Authenticate using default credentials
credential = DefaultAzureCredential()
network_client = NetworkManagementClient(credential, subscription_id)

# Retrieve the NSG resource
nsg = network_client.network_security_groups.get(resource_group_name, nsg_name)

# Add a new security rule to the NSG
new_rule = SecurityRule(name="Allow-SSH", protocol="Tcp", source_port_range="*", destination_port_range="22", access="Allow", direction="Inbound")
nsg.security_rules.append(new_rule)

# Update the NSG resource
network_client.network_security_groups.create_or_update(resource_group_name, nsg_name, nsg)

  3. Example 3: Update Network Security Group (NSG) Rules

    • Use the azure.mgmt.network package to retrieve the NSG resource.
    • Modify the existing security rules in the NSG by updating the desired properties.
    • Update the NSG resource using the network_client.network_security_groups.create_or_update method.
    from azure.identity import DefaultAzureCredential
from azure.mgmt.network import NetworkManagementClient

# Authenticate using default credentials
credential = DefaultAzureCredential()
network_client = NetworkManagementClient(credential, subscription_id)

# Retrieve the NSG resource
nsg = network_client.network_security_groups.get(resource_group_name, nsg_name)

# Modify the existing security rules in the NSG
for rule in nsg.security_rules:
    if rule.name == "Allow-SSH":
        rule.access = "Deny"

# Update the NSG resource
network_client.network_security_groups.create_or_update(resource_group_name, nsg_name, nsg)