DNS Resolution To Private IP Should Be Enabled

Using Console

Using CLI

To remediate the misconfiguration “DNS Resolution To Private IP Should Be Enabled” for AWS EC2 using AWS CLI, you can follow these steps:

Identify the security group associated with your EC2 instance:

aws ec2 describe-instances --instance-ids <your-instance-id> --query 'Reservations[*].Instances[*].SecurityGroups[*].[GroupId]' --output text

Identify the VPC ID of your EC2 instance:

aws ec2 describe-instances --instance-ids <your-instance-id> --query 'Reservations[*].Instances[*].VpcId' --output text

Enable “Accepter/Requester VPC To Private IP” setting in the security group:
```
aws ec2 modify-security-group-attribute --group-id <security-group-id> --region <your-region> --vpc-id <vpc-id> --ingress <ingress-rule>
```
Replace <security-group-id>, <your-region>, <vpc-id>, and <ingress-rule> with the actual values. The <ingress-rule> should allow traffic from the VPC CIDR range to the private IP of the EC2 instance.

Verify the changes:

aws ec2 describe-security-groups --group-ids <security-group-id>

By following these steps, you should be able to remediate the misconfiguration “DNS Resolution To Private IP Should Be Enabled” for your AWS EC2 instance using AWS CLI.

Using Python

To remediate the misconfiguration “DNS Resolution To Private IP Should Be Enabled” for AWS EC2 using Python, you can use the AWS SDK for Python (Boto3) to modify the VPC peering connection’s configuration. Here are the step-by-step instructions to remediate this issue:

Install Boto3: If you haven’t installed Boto3, you can install it using pip:
```
pip install boto3
```

Write a Python script to modify the VPC peering connection: Use the following Python script to enable the “Accepter/Requester VPC To Private IP” option for a specific VPC peering connection in AWS EC2:

import boto3

# Initialize the EC2 client
ec2_client = boto3.client('ec2')

# Specify the VPC peering connection ID that needs to be modified
vpc_peering_connection_id = 'YOUR_VPC_PEERING_CONNECTION_ID'

# Modify the VPC peering connection to enable Accepter/Requester VPC To Private IP
response = ec2_client.modify_vpc_peering_connection(
    VpcPeeringConnectionId=vpc_peering_connection_id,
    RequesterPeeringConnectionOptions={
        'AllowDnsResolutionFromRemoteVpc': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowDnsResolutionFromRemoteVpcToLocalVpc': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowDnsResolutionFromLocalClassicLinkToRemoteVpc': False,
        'AllowDnsResolutionFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False,
        'AllowEgressFromLocalClassicLinkToRemoteVpc': False,
        'AllowEgressFromLocalVpcToRemoteClassicLink': False
    }
)

print('VPC peering connection configuration updated successfully.')

Replace 'YOUR_VPC_PEERING_CONNECTION_ID' with the actual VPC peering connection ID that you want to modify.
Run the Python script: Save the script in a file (e.g., remediate_vpc_peering_connection.py) and run it using Python:
```
python remediate_vpc_peering_connection.py
```

This script will modify the specified VPC peering connection to enable the “Accepter/Requester VPC To Private IP” option in AWS EC2.

AWS Introduction

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AWS Threats

AWS Misconfigurations

DNS Resolution To Private IP Should Be Enabled

More Info:

Risk Level

Address

Compliance Standards

Triage and Remediation

Remediation

AWS Introduction

AWS Pricing

AWS Threats

AWS Misconfigurations

​More Info:

​Risk Level

​Address

​Compliance Standards

​Triage and Remediation