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ISO/IEC 27033-4:2014 gives guidance for securing communications between networks using security gateways (firewall, application firewall, Intrusion Protection System, etc.) in accordance with a documented information security policy of the security gateways, including:

1. identifying and analysing network security threats associated with security gateways;
2. defining network security requirements for security gateways based on threat analysis;
3. using techniques for design and implementation to address the threats and control aspects associated with typical network scenarios; and
4. addressing issues associated with implementing, operating, monitoring and reviewing network security gateway controls.