Of course.
Basically the configuration that superseed the 3 vlans problem is this one. You had it already but I was not understanding it. I found out during my research that this is the fix.
object network inside-nat
subnet 192.168.1.0 255.255.255.0
nat (inside,outside) dynamic interface
But then you had some other issues, I will list here.
==> You created Access List, and you did it right, but you need to apply the Access List with:
!
access-group OUTSIDE-TO-DMZ in interface outside
access-group OUTSIDE-TO-DMZ out interface dmz
!
which means, you are permiting traffic comming from outside and leaving through dmz.
==> You need to add routing on the Firewall in order to the communication with inside happen.
route inside 172.16.0.0 255.255.0.0 192.168.1.2 1
Otherwise, all traffic will be send to outside, as you created a default route :
route outside 0.0.0.0 0.0.0.0 209.165.200.254 1
And this is it for the Firewall.
On the router CORP, I had to change also a few things.
The Routers does not know how to get to the dmz network, so, I had to add a static route like this
ip route 209.165.200.0 255.255.255.0 209.165.200.253
And this:
ip route 172.16.0.0 255.255.0.0 209.165.200.253
And then, I used the command "redistribute static subnets" on theOSPF. This way I will inform the whole network that I can reach the dmz and inside.
I think this is it. If you have any more doubt, just ask.
