I've configured VPN between Cisco VPN Client on W2K and Cisco 1721 with RADIUS (according to example on Cisco web-site). It works fine. But then I set on Cisco "crypto map <clientmap> local-address Loopback N". After that VPN Client hungs up on "Securing communication channel", and Cisco1721 in debug mode says "IPSEC(validate_transform_proposal): invalid local address".
Is it VPN Client limit and it's impossible to terminate IPSec with Client by Loopback, or am I doing something wrong?
Thanks for all advise