Define In-Out-Source-and Destination access-list cisco

The router uses the agreement in, out, source, and destination as references. Cartage on the router can be compared to cartage on the highway. If you were a law administration administrator in Pennsylvania and capital to stop a barter activity from Maryland to New York, the antecedent of the barter is Maryland and the destination of the barter is New York. The roadblock could be activated at the Pennsylvania–New York bound (out) or the Maryland–Pennsylvania bound (in).

When you accredit to a router, these agreement accept these meanings.

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Out—Traffic that has already been through the router and leaves the interface. The antecedent is area it has been, on the added ancillary of the router, and the destination is area it goes.

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In—Traffic that arrives on the interface and again goes through the router. The antecedent is area it has been and the destination is area it goes, on the added ancillary of the router.

The in ACL has a antecedent on a articulation of the interface to which it is activated and a destination off of any added interface. The out ACL has a antecedent on a articulation of any interface added than the interface to which it is activated and a destination off of the interface to which it is applied.