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Event Information

  1. The v1.compute.sslPolicies.delete event in GCP for Compute indicates that an SSL policy has been deleted in the Compute Engine service.
  2. This event signifies that any existing SSL policies associated with load balancers or target proxies have been removed.
  3. It is important to note that deleting an SSL policy may impact the security and functionality of any HTTPS load balancers or SSL proxy load balancers that were using that policy.

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Examples

  • Deleting a SSL policy without proper authorization or authentication can lead to unauthorized access to sensitive data or resources.
  • Deleting a SSL policy without proper backup or redundancy measures can result in service downtime or loss of availability.
  • Deleting a SSL policy without proper logging or auditing mechanisms can make it difficult to track and investigate security incidents or policy changes.

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Remediation

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Using Console

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

  1. Restricting SSH access:

    • Go to the GCP Console and navigate to the Compute Engine section.
    • Select the instance for which you want to restrict SSH access.
    • Click on the “Edit” button at the top of the page.
    • Scroll down to the “Firewalls” section and click on “Add firewall rule”.
    • Provide a name for the firewall rule and set the “Targets” to “All instances in the network”.
    • In the “Source IP ranges” field, enter the IP range from which you want to allow SSH access (e.g., your organization’s IP range).
    • Set the “Protocols and ports” to allow SSH (port 22) traffic.
    • Click on the “Create” button to save the firewall rule.

  2. Enabling VPC Flow Logs:

    • Go to the GCP Console and navigate to the VPC Network section.
    • Select the VPC network for which you want to enable flow logs.
    • Click on the “Edit” button at the top of the page.
    • Scroll down to the “Flow logs” section and click on “Add flow log”.
    • Provide a name for the flow log and select the desired configuration options (e.g., sampling rate, metadata inclusion).
    • Choose the desired destination for the flow logs (e.g., Stackdriver Logging, Cloud Storage).
    • Click on the “Create” button to enable flow logs for the VPC network.

  3. Implementing IAM best practices:

    • Go to the GCP Console and navigate to the IAM & Admin section.
    • Select the project for which you want to implement IAM best practices.
    • Click on the “IAM” tab to view the IAM roles and permissions.
    • Review the existing IAM roles and identify any unnecessary or overly permissive roles.
    • Remove any unnecessary roles and update the permissions of existing roles to follow the principle of least privilege.
    • Consider creating custom IAM roles with specific permissions tailored to the needs of different user groups.
    • Regularly review and audit the IAM roles and permissions to ensure they align with the least privilege principle and organizational requirements.

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Using CLI

  1. Enable VPC Flow Logs for GCP Compute instances:

    • Use the gcloud compute instances update command to enable VPC Flow Logs for a specific instance: 
      gcloud compute instances update INSTANCE_NAME --enable-network-endpoint-logging

  2. Restrict SSH access to GCP Compute instances:

    • Use the gcloud compute firewall-rules update command to update the firewall rule for SSH access: 
      gcloud compute firewall-rules update FIREWALL_RULE_NAME --source-ranges=IP_RANGE --allow=tcp:22

  3. Implement disk encryption for GCP Compute instances:

    • Use the gcloud compute disks create command to create an encrypted disk: 
      gcloud compute disks create DISK_NAME --size=SIZE --type=DISK_TYPE --encryption-key=KEY_NAME

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Using Python

To remediate the issues mentioned in the previous response for GCP Compute using Python, you can use the following approaches:

  1. Enforce strong passwords:

    • Use the Google Cloud Identity and Access Management (IAM) API to create a custom role with the necessary permissions to manage user accounts.
    • Write a Python script that utilizes the IAM API to enforce strong password policies for GCP Compute instances.
    • The script should iterate through all the instances and update the passwords for the user accounts based on the defined policy.

  2. Enable disk encryption:

    • Use the Google Cloud Key Management Service (KMS) API to create a key ring and a key for disk encryption.
    • Write a Python script that utilizes the Compute Engine API to enable disk encryption for all the Compute instances.
    • The script should iterate through all the instances and enable disk encryption using the created key.

  3. Implement network security groups:

    • Use the Google Cloud Firewall API to create network security groups (firewall rules) to restrict inbound and outbound traffic.
    • Write a Python script that utilizes the Firewall API to create and apply the necessary firewall rules to the Compute instances.
    • The script should iterate through all the instances and apply the defined network security groups to ensure proper traffic filtering.

Please note that the provided scripts are just high-level examples, and you may need to modify them based on your specific requirements and environment setup.