Enterprise infrastructure

Firewall

A device or software that filters network traffic according to defined rules. A Layer 4 firewall decides based on IP addresses and ports, while a Layer 7 firewall understands the content of application traffic and can make finer decisions.

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Related terms

Demilitarized zone / screened subnet (DMZ) Jump server / bastion host Intrusion detection system / intrusion prevention system (IDS/IPS) Next-generation firewall (NGFW) Web application firewall (WAF) 802.1X port-based network access control

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