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.