I would like to use the Cisco 1921-sec/k9 as a WAN router + VPN (site to site and remote access) + firewall.  I believed the IOS is sufficient but want to see if anything else is needed.  Also, where can I get a Cisco VPN client for remote access?

Can a Cisco router at the remote site established 2 GRE tunnels, one to each host site.  So host A will communicate with the remote site via tunnel A.  If host A is gone, host B will communicate with remote site via tunnel B.  The sites will be runni...