---
names:
  full: "Azure Virtual Machine allows public access to NetBIOS ports"
  contextual: "Virtual Machine allows public access to NetBIOS ports"
description: >
  Ensure that Azure Virtual Machines do not allow unrestricted public NetBIOS traffic 
  (TCP/UDP 137, 138, 139).
categories:
  - "SECURITY"
type: "COMPLIANCE_POLICY"
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-27001-2013/09/01/02"
  - "/frameworks/pci-dss-v4.0.1/02/02/05"
  - "/frameworks/soc-2/cc6/01/07"
  - "/frameworks/soc-2/cc6/06/01"
similarPolicies:
  internal:
    - dec-x-501db687