---
names:
  full: AWS EC2 Security Group allows unrestricted NetBIOS traffic
  contextual: Security Group allows unrestricted NetBIOS traffic
description: >
  Ensure that AWS EC2 security groups do not allow unrestricted NetBIOS traffic 
  (TCP: 137, 139; UDP: 137, 138).
type: COMPLIANCE_POLICY
categories:
  - SECURITY
frameworkMappings:
  - "/frameworks/iso-iec-27001-2013/13/01/01"
  - "/frameworks/pci-dss-v4.0.1/01/03/01"
  - "/frameworks/pci-dss-v4.0.1/01/03/02"
  - "/frameworks/cloudaware/resource-security/network-exposure"
  - "/frameworks/iso-iec-27001-2013/09/04/01"
  - "/frameworks/pci-dss-v4.0.1/01/04/01"
  - "/frameworks/pci-dss-v4.0.1/01/04/02"
similarPolicies:
  internal:
    - dec-x-6eab9b88
  cloudConformity:
    - url: https://www.trendmicro.com/cloudoneconformity/knowledge-base/aws/EC2/unrestricted-netbios-access.html
      name: Unrestricted NetBIOS Access