PCI (Payment Card Industry Security Standard)_Test 1.3.5

PCI (Payment Card Industry Security Standard)

Install and maintain a firewall configuration to protect cardholder data

Test 1.3.5

1.3.5 Examine firewall and router configurations to verify that the firewall permits only established connections into the internal network and denies any inbound connections not associated with a previously established session.

A firewall that maintains the “state” (or the status) for each connection through the firewall knows whether an apparent response to a previous connection is actually a valid authorized response (since it retains each connection’s status) or is malicious traffic trying to trick the firewall into allowing the connection.


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