qosaalert.blogg.se - Man iptables

Targets: A target is a decision of what to do with a packet.

The outcome, where a packet is sent, is called a target. Rules can block one type of packet, or forward another type of packet.

Rules: A rule is a statement that tells the system what to do with a packet.

When a packet is received, iptables finds the appropriate table, then runs it through the chain of rules until it finds a match.

Tables: Tables are files that join similar actions.Iptables identifies the packets received and then uses a set of rules to decide what to do with them. Data is broken up into smaller pieces (called packets), sent over a network, then put back together. Access to a terminal window/command line (Ctrl-Alt-T, Ctrl-Alt-F2).