Iptables - Korenix JetBox 8100 User Manual

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4.5 IPTABLES

IPTABLES is an administrative tool for setting up, maintaining, and
inspecting the Linux kernel's IP packet filter rule tables. Several different
tables are defined, with each table containing built-in chains and
user-defined chains.
Each chain is a list of rules that apply to a certain type of packet. Each rule
specifies what to do with a matching packet. A rule (such as a jump to a
user-defined chain in the same table) is called a "target."
Since JetBoc 8100 has one network interface, it supports Filter table of
IPTABLES.
Filter Table—includes three chains:
INPUT chain
OUTPUT chain
FORWARD chain
NOTE Jetbox8100 does NOT support IPV6 and ipchains.
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