Is it possible to use a Cisco 881 along with a broadband router to connect to Amazon VPC (with hardware VPN option)?
I have a home network that runs behind a broadband router. My internal network is 192.168.75/24. For personal reasons, I wish to join my network to Amazon VPC (it has to be the hardware VPN option for reasons I won't go into here) for doing some experimentation. I still want to access the Internet (i.e., I think this is called split tunnelling).
I'm thinking of buying a Cisco 881 Integrated Services Ethernet Security Router w/ Advanced IP Services (code: CISCO881-SEC-K9), to provide the secure connection to Amazon VPC (it is one of their supported devices).
However, I'm a bit confused about whether this is possible (mostly to do with routing). I've drawn a picture what I think I need: Network Diagram
The red arrows in my picture represent a secure connection from my home PC to the Amazon EC2 instance on the VPC. The blue arrows represent a normal connection from my PC out to the internet.
Is this scenario possible? I want to connect to a EC2 instance in the Amazon VPC (say 172.16.100.1). My broadband router has a static route to send all 172.16/16 requests to the Cisco 881. The 881 creates the VPN tunnel to the Amazon VPC by going back through the broadband router and establishes a connection to Amazon VPC and then sends my request to 172.16.100.1 to that instance.
I'm not too strong on routing and I wonder will this work? My requirement is to have the internet up and accessible always, but all 172.16/16 requests tunnelling via the Cisco 881 to the Amazon EC2 instances.
Thanks in advance network geniuses!