cisco asa access-list/access-group in/out question

in the asdm how to specify whether an access-list is going in or out.     I know in the cli i could probably type access-group in or out.  but in the asdm every access-list automatically goes in the in direction.      

Also, i have a dmz interface with security zone 50 and of course inside interface is of course security 100.    of course i can ping from inside to dmz since it's higher to lower security.   from dmz to inside i need an access-list since it's lower to higher zone.   i have an access-list allowing traffic from source dmz to destination inside and it's working fine.    The access-list if you look at the cli is applied in the in direction on the dmz interface.     I'm a little confused.  it seems it should be applied in the out direction since the traffic is leaving the dmz to go to the inside interface?
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techlindenAuthor Commented:
nevermind.  i think im an idiot.  i found where you can specify the direction in the asdm.  kind of weird though that the traffic from the dmz to the inside is allowed via an access-list in the in direction to the dmz interface
You have to look at it from the interface's perspective. When the traffic leaves the dmz it goes into the interface; therefore "in". When the traffic goes to the dmz it goes "out" of the interface and into the dmz.

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techlindenAuthor Commented:
that's a very good explanation.       i'm going to copy it because i will forget since it seems a little illogical since if i was an interface i would consider traffic leaving the dmz as going out of the interface.  however if i reverse the direction of the access-list it blocks the traffic so i don't doubt that you are correct since it's working this way.     thanks so much
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