This is not correct! You cannot use DENY in NAT Exemption. Actually you
must use PERMIT to subject IPs to be NAT exempt. For example, to exempt
local user from network 10.1.1.0/24 from NATting you must use:

access-list NO-NAT per 10.1.1.0 255.255.255.0 6.6.0.0 255.255.0.0
nat (i) 0 access-list NO-NAT

then for example

nat (i) 1 0 0
global (o) 1 interface

Given the above configuration, hosts from inside network going to
6.6.0.0/16will NOT be translated.
Assuming you have no NAT-Control enabled, this will do the trick.

Regards,
Piotr


2011/12/28 n.issam <[email protected]>

> Hi all ,
>
> I need to now if we told as to configure NAT on ASA for inside user when
> browsing internet we  have to exempt global  network from nat
> for exemple :
>
> global  network is 6.6.0.0/24
> configuration of nat
>
> access-list nat deny ip any 6.6.0.0 255.255.0.0
> access-list nat permit ip any any
> nat (i) 1 access-list nat
> global (o) 1 interface
>
> If this configuration is correct or we have to exempt also rfc 1918 from
> nat
>
> BR
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