it's unsupported feature.
but you can try
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service internal <-- #### HIDDEN COMMAND, REQUIRED ###
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip cef
!
!
!
!
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
multilink bundle-name authenticated
vpdn enable
!
vpdn-group PPTP
request-dialin
protocol pptp
rotary-group 0
initiate-to ip 10.0.0.1
l2tp tunnel receive-window 1024
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address 10.0.0.5 255.255.255.252
duplex full
speed 100
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Dialer0
ip address negotiated
encapsulation ppp
dialer in-band
dialer idle-timeout 0
dialer string 123456
dialer vpdn
dialer-group 1
no cdp enable
ppp encrypt mppe auto
ppp chap hostname cisco
ppp chap password 0 cisco
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Dialer0
ip route 10.0.0.1 255.255.255.255 10.0.0.6
no ip http server
no ip http secure-server
!
!
!
logging alarm informational
dialer-list 1 protocol ip permit
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
gatekeeper
shutdown
!
!
line con 0
stopbits 1
line aux 0
line vty 0 4
!
!
end
