I have a Easy VPN remote configured on an 877 router, connecting to an 1801 running Easy VPN server. The vpn connects, and the 877 can ping clients on the remote network, but no clients on the LAN connected to the 877 can ping the remote LAN. Both sites use internal IP schemes and Nat to the Internet, but I believe I have filtered it correctly to prevent the vpn traffic being nat-d, and no packets are dropped by firewall. The IP schemes do not overlap. Any ideas where I'd go to troubleshoot this? I've gone through all the scenarios on the IPSec VPN troubleshooting page, but none of them seem to cover my issue.
I have this problem too.