troubleshooting Question

Cisco ASA5520 understanding NAT rules

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SvenIAFlag for Netherlands asked on
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Hi Experts,

I have some questions about NAT rules. I have a running config of an ASA5520 with some NAT rules i'm trying to understand. I hope that someone can explain the following NAT rules to me.

First of all, in some rules I see the number 0, 1 or 2 comming back all the time. What does this number mean? And what does the global mean?

global (outside) 2 netmask
global (outside) 1 interface
nat (inside) 0 access-list NONAT

Second I see some access-group commands in front of an access list. What does this mean?

access-group OUTSIDE_ACCESS_IN in interface outside
access-group INSIDE_ACCESS_IN in interface inside

Thanks in advance!

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