DynDNS via DTMF

Update your DNS records via phone!

Features

• Press 1 - Get current IP
• Press 2 - Update IP. When prompted, enter in a new IP. Press # when complete

Setup Notes

AWS Setup

• Create a new AWS Lambda function via the AWS console
• Add a rest API by adding an API Gateway Trigger
  • Configure proxy integration
• Configure the following environmental variables for the Lambda function
  • DTMF_DOMAIN_NAME is the Route53 A record to update via dtmf
  • HOSTED_ZONE_ID is the Route53 zone ID where DTMF_DOMAIN_NAME resides
• Create IAM policy for Route53

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": "route53:ChangeResourceRecordSets",
            "Resource": "arn:aws:route53:::hostedzone/XXXXXXXXXXXXXX"
        },
        {
            "Sid": "VisualEditor1",
            "Effect": "Allow",
            "Action": "route53:ListHostedZones",
            "Resource": "*"
        },
        {
            "Sid": "VisualEditor2",
            "Effect": "Allow",
            "Action": "route53:ListResourceRecordSets",
            "Resource": "arn:aws:route53:::hostedzone/XXXXXXXXXXXXXX"
        }
    ]
}

• Attach policy to Lambda Role

Twilio Setup

• Provision new number
• Point to API endpoint for lambda function

Local Setup

Download project from github and install node dependencies.

git clone https://github.com/karlcswanson/dtmf.git
cd dtmf/
npm install

Compress and upload to AWS Lambda.

npm run pack
npm run push

Future Feature Ideas

• Script IAM Policy creation and attachment to Lambda role
• Script API trigger creation
• Fax confirmation usig Twilio fax API
• IP input validation
• Use Webpack to pack for upload

Notes

• Packaging and updating Lambda code
• Lambda Proxy Integrations
• Route53 JS SDK - Change resource record sets