Cisco VPN server how to overcome internet shutdown?

Question

Cisco

Good afternoon dear community.
According to the mana in the network, I set up a VPN server. but there was a problem: after connection of VPN of the user at it the Internet falls off, but vnutr networks on cisco are available.
config

vpdn enable
!
vpdn-group 1
 ! Default PPTP VPDN group
 accept-dialin
  protocol pptp
  virtual-template 1
 l2tp tunnel timeout no-session 15
!
!
interface GigabitEthernet0/0
 description WAN
 ip address xxx.xxx.xx.xxx 255.255.240.0
 ip access-group 102 in
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 description LAN
 ip address 192.168.1.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface Virtual-Template1
 description PPPTP_INT
 mtu 1300
 ip unnumbered GigabitEthernet0/0
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip virtual-reassembly in
 ip verify unicast reverse-path
 peer default ip address dhcp-pool LAN
 no keepalive
 ppp encrypt mppe 128
 ppp authentication ms-chap-v2
 ppp ipcp dns 192.168.1.1 192.168.1.1
!

102 acces-list contains DNAT rules
I ask for your help in solving the problem.

Answer 1

alexdob first time you issue addresses from the LAN segment, then in interface Virtual-Template1 you need to specify ip unnumbered GigabitEthernet0/1 i.e. LAN interface.
Secondly - the problem may be with the pptp client settings - under Windows, when creating a vpn, the option "use the default gateway on the remote network" is enabled by default. It must be disabled in the vpn settings. Then you will see the LAN subnet and will be able to use the Internet at the same time .