Static Nat help Cisco 1851

[nhidalgo]

not sure this is possible with my current router.

f0/0 is connected to DSL modem ipsec vpn back to HQ
f0/1 is connected to store switch. Subnet 192.168.73.0 Subnet 192.168.31.0


what i need to do is nat 192.168.73.11 to 192.168.31.11 is this possible with the current config or do i need another interface?

Here is a bit of the config
interface FastEthernet0/1
ip address 192.168.31.1 255.255.255.0 secondary
ip address 192.168.73.1 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto


ip nat inside source static 192.168.73.11 192.168.31.11

 

[Minue]

Hello
I have never seen something similar,don't think it's possible.If you explain to us,what your'e trying to achieve maybe we can advice you on some other work around.

Regards

 

[wingatesl]

You will not be able to nat between the two networks on the same interface and still make it out to the internet. There are a few ways around this, but we will need to see a diagram and get an idea of your expectations.

 

[nhidalgo]

hq subnet 192.168.90.0 <----remote site ipsec l2l vpn subnet 192.168.73.0 primary subnet on remote site.
Router 192.168.73.1, secondary ip on router 192.168.31.1
I have a system with a static ip of 192.168.31.11 in this site which cannot be changed. The problem is i already have another different remote site with a subnet address of 192.168.31.0. What i need to be able to do it nat 192.168.73.11 to 192.168.31.11. So when i cann connect from HQ to the site i can access this 31.11 host.

I have yet to test it but i was told i just need to do the following.
outside interface
nat outside

inside interface
nat inside

nat inside static source 192.168.73.11 192.168.31.11

Thanks for your response.