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) 2 192.168.80.1-192.168.80.254 netmask 255.255.255.0
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!