ACL processing on a GRE Tunnel interface

Unanswered Question
Dec 19th, 2007

How are ACL's processed on a Tunnel (GRE) interface?

Are the ACl's associated with an ip access-group OUT command processed before or after a packet being sent out the Tunnel interface is wrapped in the GRE tunnel packet?

Are the ACl's associated with an ip access-group IN command processed before or after a packet arriving at the Tunnel interface is unwrapped from the GRE tunnel packet?

I have this problem too.
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