subnet-to-subnet NAT

[luve]

Hi there,
Before trying Untangle, I would like to know if it's possible to do NAT between 2 (private address space) subnets.
The goal is to translate 172.29.0.0/16 into 172.19.0.0/16 and reverse
Any IP in the 172.29 is NATted to the corresponding IP beginning with 172.19 (same host part).
The subnet 172.29 is a duplicate (for testing purposes) of a prod subnet with same addressing plan (too much work to change the addressing everywhere in the test env., so everything is duplicated as is, but in a separate VLAN).
Situation: we currently have a CheckPoint FW that do the NAT (and another FW that do the firewalling), but this is not our HW and it's a temp CheckPoint lic.
So we would like to implement this with an Untangle "Virtual Appliance" if possible.
Thanks for replies ;-)

[dmorris]

Yes it is possible BUT you must define what "corresponding" means by using nat policies

172.29.0.1/32 -> 172.19.0.1
172.29.0.2/32 -> 172.19.0.2
...

There is no feature that says just change one byte of the IP when NATing such that it preserves the rest.

[luve]

Thanks for your answer.
In this idea, should it be possible to import such a list (that I could generate with a little script) ?
Luc V.

[mrunkel]

it sounds to me like you don't want NAT, you want to bridge. then just change the internal addresses.

much cleaner.

[luve]

I'll try this.
Thanks,
Luc V.