sorry for that silly question and my bad grammar, i have tried to configure L2TP with IPSec on this topology but i still can't activate the IPSec on the router. the L2TP tunnel is worked properly, but when i add an IPSec, the tunnel still worked with no IPSec running.
i use this configuration on gateway router
/ip ipsec proposal
set [ find default=yes ] enc-algorithms=3des,aes-128,aes-192,aes-256
/ip ipsec peer
add generate-policy=yes hash-algorithm=sha1 nat-traversal=yes secret=test123456 send-initial-contact=no
i use RouterOS v4.3
my client is windows 7 home premium
what should i do next?