​
Event Information

  • The Microsoft.Network.connections.delete event in Azure for AzureNetwork refers to the deletion of a network connection in the Azure networking infrastructure.
  • This event indicates that a network connection between two resources within the Azure network has been removed or deleted.
  • It is important to monitor this event as it can help track changes and ensure the network connections are properly managed and maintained in the Azure environment.

​
Examples

  1. Unauthorized deletion of AzureNetwork connections: If security is impacted with Microsoft.Network.connections.delete in Azure for AzureNetwork, it could potentially allow unauthorized users to delete network connections. This could lead to disruption of network connectivity and potential security breaches.

  2. Loss of network segmentation: Deleting network connections in AzureNetwork without proper authorization or validation can result in the loss of network segmentation. This can lead to unauthorized access to sensitive resources and compromise the overall security posture of the network.

  3. Denial of Service (DoS) attacks: If an attacker gains access to delete network connections in AzureNetwork, they could potentially launch a Denial of Service (DoS) attack by selectively deleting critical connections. This can result in service disruptions, loss of availability, and impact the overall security and performance of the network.

​
Remediation

​
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.
    • Associate the NSG with 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 “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. It is important to consider your specific requirements and consult the Azure documentation for detailed instructions and best practices.

​
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.

​
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 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)