D-Link DFL-210-WCF-12 Product Manual - Page 446
Pipe Rules Determine Pipe Usage, Note: No pipe rules are defined by default
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10.1.2. Traffic Shaping in NetDefendOS Chapter 10. Traffic Management Pipe Rules One or more Pipe Rules make up the NetDefendOS Pipe Rule set which determine what traffic will flow through which pipes. Each pipe rule is defined like other NetDefendOS secuirity policies: by specifying the source/destination interface/network as well as the service to which the rule is to apply. Once a new connection is permitted by the IP rule set, the pipe rule set is then checked for any matching pipe rules. Pipe rules are checked in the same way as IP rules, by going from top to bottom (first to last) in the rule set. The first matching rule, if any, decides if the connection is subject to traffic shaping. Keep in mind that any connection that does not trigger a pipe rule will not be subject to traffic shaping and could potentially use as much bandwidth as it wants. Note: No pipe rules are defined by default The rule set for pipe rules is initially empty with no rules being defined by default. At least one rule must be created for traffic shaping to begin to function. Pipe Rule Chains When a pipe rule is defined, the pipes to be used with that rule are also specified and they are placed into one of two lists in the pipe rule. These lists are: • The Forward Chain These are the pipe or pipes that will be used for outgoing (leaving) traffic from the NetDefend Firewall. One, none or a series of pipes may be specified. • The Return Chain These are the pipe or pipes that will be used for incoming (arriving) traffic. One, none or a series of pipes may be specified. Figure 10.1. Pipe Rules Determine Pipe Usage The pipes that are to be used are specified in a pipe list. If only one pipe is specified then that is the pipe whose characteristics will be applied to the traffic. If a series of pipes are specified then these will form a Chain of pipes through which traffic will pass. A chain can be made up of a maximum 446