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ck8882
New Contributor II

Is it possible support different IP pool IP address from same source, different dest in Duat Nat

Hi Anyone,
Would like to know if fortigate support different IP pool address from same source, different destination in Dual Nat ? (Central NAT and DNAT)
 
For example below (example migrate from checkpoint/cisco)
 
Original SourceOriginal DestinationTranslated AddressTranslated Destination
10.12.10.10010.10.10.12 10.91.18.100
10.110.37.11
10.12.10.10010.10.10.1010.91.18.99
10.110.37.11
 
Thanks
5 REPLIES 5
hbac
Staff
Staff

Hi @ck8882

 

If you are using central NAT, it should work as SNAT and DNAT are handled separately. 

 

Regards, 

ck8882
New Contributor II

HI @hbac 

 

Thanks for your comment. So i also could conclude it FGT is not support design above as the traffic only will work either one or the other, which is not able to match the checkpoint NAT config and migrate over to FGT.

 

Thanks

hbac

@ck8882

 

It is supported. I tested in my lab and it worked. What I'm saying is SNAT and DNAT are configured separately unlike Checkpoint which you can configure in the same rule. NAT with different IP pool IP address from the same source and different destination should work on FortiGate. 

 

Regards, 

ck8882
New Contributor II

HI @hbac ,

 

I was tested it with above design and condition, however, it's not work as expected. Would you mind share the configuration since your testing is working.

 

In my testing, as the 2 list Original Source and Translated Destination value is same, the traffic will be only work on top SNAT (10.91.18.100) flow after either one DNAT table process. The 2nd list of SNAT (10.91.18.99) will not been even hit.

 

Is there any configuration or comment from FGT could manual force translate source “10.91.18.99” would be apply to process if the traffic from 2nd list?

 

Thanks

hbac

@ck8882,

 

Below is my setup. 

Original Source Original Destination Translated Address Translated Destination
192.168.3.2 192.168.3.100 192.168.10.100
192.168.10.2
192.168.3.2 192.168.3.200 192.168.10.200
192.168.10.3

SNAT.PNG

 

DNAT1.PNG

 policyy.PNG

 

Regards, 

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