[nsp] nat question

[Roger]

I'd like to be able to forward all ports/protocols to an internal 
address based upon source ip.

Example:

I need to forwarded all ports/protocols to 192.168.0.100, reachable by 
ther routers interface eth0, if it coming from a perticular external ip

interface Ethernet0
 ip address 192.168.0.100 255.255.255.0
 ip nat inside
!
interface Ethernet1
 ip address dhcp
 ip nat outside
!
ip nat inside source list nat_acl interface Ethernet1 overload
ip access-list standard nat_acl
 permit 192.168.0.0 0.0.0.255

Now I can forward individual ports like so

ip nat inside source static tcp 192.168.0.11 1723 interface Ethernet1 1723

The problem is I'd like to be able to do this

if source ip = x.x.x.x then forward to 192.168.0.100

and putting in a bunch of individual forwards just won't do.

I also have only 1 ip - so I can't do 1 to 1 nat like so

ip nat inside source static 192.168.0.100 <external_ip> extendable

I'm thinking my only choice will be to run a vpn from 192.168.0.100 to 
the external ip in question.

Suggestions?

-- 
Rock River Internet                          Roger Grunkemeyer
202 W. State St, 8th Floor                grunky at rockriver.net
Rockford, IL 61101                           815-968-9888 x102