1.1.4 Requirements for a firewall at each Internet connection and between any demilitarized zone (DMZ) and the internal network zone
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1.1.3 Current diagram that shows all cardholder data flows across systems and networks
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1.1.2 Current network diagram that identifies all connections between the cardholder data environment and other networks, including any wireless networks
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1.1.1 A formal process for approving and testing all network connections and changes to the firewall and router configuration
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Requirement 1: Install and maintain a firewall configuration to protect cardholder data
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1.1 Establish and implement firewall and router configuration standards that include the following:
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