I am looking to use an ASA 5510 as a VPN device only (similar to the old VPN Concentrator) We already have an ASA5510 acting as a firewall to the internet from our central office. We also have a MPLS network to 7 other locations, and they all go through the Central Office for internet access. I will have VPN client users, and site to site VPNs connecting to the CO, and will need to access hosts in other sites in the MPLS network, as well as hosts in the CO. I am confused on where I should place my VPN ASA. I was thinking that I should put it at the same level of my Firewall ASA, but then I am not sure what I need to use as far as routing to make sure my traffic is able to flow properly. It would not let me post an attachment, so here is a link of the CO and MPLS general setup.
Any insight would be greatly appreciated.