I have a VPN client behind a router 851 connect to an ADSL line. The VPN client version 5.0.04.0300 connect to an ASA5520 at the main office. Connection successful, but it take 60 seconds to get an access to the remote network. I swap the router 851 for a cheap linksys WRT54G with Ipsec pass-through and the network access is up 1 second after the connection. What's happening with the router 851 ?