[FAQ]What Is the Relationship Between the permit/deny Rules in an ACL and Those

Latest reply: Dec 29, 2015 01:34:54 1057 1 0 0

An ACL is usually used with a traffic policy. A traffic policy includes the traffic classifier that meets the requirement of an ACL and a traffic behavior, such as permit/deny. The permit/deny rules in an ACL and a behavior in the traffic policy are used as follows.

ACL

Behavior in a Traffic Policy

Action Taken for Matching Packets

permit

permit

permit

permit

deny

deny

deny

permit

deny

deny

deny

deny

  • x
  • convention:

who_knows
Created Dec 29, 2015 01:34:54 Helpful(0) Helpful(0)

The traffic policy module permits packets by default. If you just want to block mutual access between network segments, you only need to define the characteristics of the packets to be denied in the ACL. If you add rule permit at the bottom of the ACL, the packets that do not match previous rules will match the last rule. In addition, if the traffic behavior is set to deny, the device discards all packets matching rule permit. As a result, all services are interrupted.

  • x
  • convention:

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