04-21-2011 04:25 AM - edited 03-11-2019 01:24 PM
Hi,
Wanted to know order of NAT from version 8.3 onwards.
Deocumentation says Section 1 Twice Nat
Section 2 Network Object Nat
Section 3 Twice Nat
By default twice nat falls in Section1 (Correct me if I am wrong). How come it also falls in Sections3 as well.Is it something like bypassing nat (more like Nat 0 of older versions) while configuring VPN?
Reg,
Sushil
Solved! Go to Solution.
04-21-2011 05:12 AM
Hi Sushil,
The order of NAT in 8.3 and above is:
1. Manual Nat
2. Auto NAT
3. After-Auto
After auto, are Manual Nat's with the "after-auto" keyword in them. These are processed after Manual nat rules without that keyword, and auto nat.
syntax: nat (intf1,intf2) after-auto ....
An ideal scenario, where you would use this would be:
All statics configured using Auto NAT.
For some reason, interface pat for internet is to be done using manual nat.
If you use the class 1 manual nat, then it will break all the auto nat static forwards. Hence, you add after-auto, so that it is processed only after the statics are checked.
Hope this helps.
-Shrikant
P.S.: Please mark the question as answered if it has been resolved. Do rate helpful posts. Thanks.
04-21-2011 05:12 AM
Hi Sushil,
The order of NAT in 8.3 and above is:
1. Manual Nat
2. Auto NAT
3. After-Auto
After auto, are Manual Nat's with the "after-auto" keyword in them. These are processed after Manual nat rules without that keyword, and auto nat.
syntax: nat (intf1,intf2) after-auto ....
An ideal scenario, where you would use this would be:
All statics configured using Auto NAT.
For some reason, interface pat for internet is to be done using manual nat.
If you use the class 1 manual nat, then it will break all the auto nat static forwards. Hence, you add after-auto, so that it is processed only after the statics are checked.
Hope this helps.
-Shrikant
P.S.: Please mark the question as answered if it has been resolved. Do rate helpful posts. Thanks.
04-21-2011 05:38 AM
Ultimate discription Shrikant.Thanks a ton.
Reg,
Sushil
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