inter-network connection device that restricts data communication traffic between two connected networks (10)
NOTE: A firewall may be either an application installed on a general-purpose computer or a dedicated platform (appliance), that forwards or rejects/drops packets on a network. Typically firewalls are used to define zone borders. Firewalls generally have rules restricting which ports are open.
ISA-62443.03.02
a hardware device or software package that provides filtering and/or provision of rules to allow or deny specific types of network traffic to flow between internal and external networks
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Last modified at 12/29/2011 3:59 PM by Eric Cosman
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