Packet Filtering
Completion requirements
This article explains packets, packet headers, and packet filtering. What can the option of allowing or disallowing packets be based on? What are the weaknesses and advantages of packet filtering? After you read, you should be able to describe packets and packet headers.
Security Handbook/Firewalls
This section is on filtering packets.
Source: https://wiki.gentoo.org/wiki/Security_Handbook/Firewalls#Packet_filtering
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