Vocabulary

• Netfilter; Table; Chain

• Match – a selection criterion such as SA, IP protocol, destination port and interface

• Target – where to go if the match is met, e.g., another chain, log, ACCEPT and DROP – in effect, the action to take

• Action – what to do with the rule or chain (as opposed to the packet), e.g., Insert, Append, Delete, List, Replace, Flush, Zero counters, Create, set Policy

Notes: