Serverless Resource Policy

Creates a whitelist for IP or CIDR addresses accessing a serverless application, using serverless resource policies. This enables you to allow requests only from the IP or CIDR addresses you specify.

Private and Public Stages

CIDR and IP addresses are whitelisted by stages.

• privateStages: Private to whitelisted CIDR and IP addresses. In the example below, our dev and staging stages are privateStages, so only those CIDR and IP addresses can access dev and staging.
• publicStages: No whitelisting necessary. These stages are public to all CIDR and IP addresses.

How to Use

1. Install in your serverless application: npm install --save serverless-resource-policy
2. In your serverless.yml file, add the serverless-resource-plugin, for example:
   plugins:
   - serverless-resource-policy

3. Within the provider block, add a stage variable:
   provider:
     stage: ${opt:stage, 'dev'}

4. Within a custom block, add:
   custom:
     serverless-resource-policy:
       stage: ${self:provider.stage}
       privateStages:
         - dev
         - staging
       publicStages:
         - production
       netblocks:
         - 123.45.67.890/30
         - 987.65.432.109

The netblocks object will contain the list of whitelisted IPs.

Full Example

# serverless.yml
service: my-service-name
plugins:
  - serverless-resource-policy
provider:
  stage: ${opt:stage, 'dev'}
custom:
  serverless-resource-policy:
    stage: ${self:provider.stage}
    privateStages:
      - dev
      - staging
    publicStages:
      - production
    netblocks:
      - 123.45.67.890/30
      - 987.65.432.109

Contributing

Currently maintained by the lovely folks on HubSpot's Web Team, but we need your help. Please feel free to submit pull requests to add new functionality.