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This article looks at some of the decision considerations in selecting a Linux-based firewall, including both considerations specific to firewall technology and general considerations about understanding Linux-based and open source options.
This article explains the general frame of reference for what network communication is, how network-based services are identified, what a packet is, and the types of messages and information sent between computers on a network.
The objective of this document is to demonstrate how to harden iptables in real-time.
