Hello all
I am not able anymore to establish a L2TP IPSEC VPN connection to my Cisco Router.
The Windows 10 integrated VPN Client show this error message: Error code 809 - The network connection between your computer and the VPN server could not be established because the remote server is not responding.
Things changed between working and non-working state:
-IOS on Router updated from Version 15.5 to 15.6
-The Windows 10 Client got the usual monthly updates from Microsoft
Config Quick Overview:
*******
interface GigabitEthernet8
ip address 192.168.1.5 255.255.254.0
duplex auto
speed auto
no cdp enable
crypto map CRYP_MAP
interface Loopback0
ip address 192.168.64.1 255.255.255.0
interface Virtual-Template1
ip unnumbered Loopback0
ip nat inside
ip virtual-reassembly in
peer default ip address pool VPNPOOL
ppp mtu adaptive
ppp authentication ms-chap-v2
interface Vlan1
ip address 10.10.64.12 255.255.254.0
ip nat outside
ip virtual-reassembly in
ip local pool VPNPOOL 192.168.64.10 192.168.64.19
ip nat inside source list ACL-NAT interface Vlan1 overload
ip access-list standard ACL-NAT
permit 192.168.64.0 0.0.0.255
vpdn-group L2TP
! Default L2TP VPDN group
accept-dialin
protocol l2tp
virtual-template 1
no l2tp tunnel authentication
crypto isakmp policy 1
encr aes 256
hash sha256
authentication pre-share
group 14
lifetime 3600
crypto isakmp key xxxxxxxxxxxxxxxxxxxxx address 0.0.0.0
crypto isakmp keepalive 3600
crypto ipsec transform-set TS1 esp-aes 256 esp-sha256-hmac
mode transport
crypto dynamic-map dynamic-map 10
set nat demux
set transform-set TS1
crypto map CRYP_MAP 6000 ipsec-isakmp dynamic dynamic-map
*******
Please see attached debuglog.txt
According the log I would say that IPSEC Phase 1 and 2 are completed successfully, but then something stop working.
Can anyone please give me a advice what the problem could be?
Thank you in advance.
Kind regards
Michael
