6.1 For payment applications using wireless technology, the wireless technology must be implemented securely.
PCI Data Security Standard Requirement 1.3.8 & 2.1.1
Testing Procedures:
6.1.a For payment applications developed by the vendor using wireless technology, and other wireless applications bundled with the payment application, verify that the wireless applications do not use vendor default settings and are configured in accordance with PCI Data Security Standard Requirement 2.1.1.
6.1.b Examine the PA-DSS Implementation Guide prepared by the vendor to verify that customers and resellers/integrators are instructed, if wireless is used, to install a firewall per PCI DSS Requirement 1.3.8.