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08.23.2007 at 08:21AM PDT, ID: 22782490
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Configuring Cisco VPN Client on IOS using Active Directory Authentication

Tags: cisco, vpn, client, active, directory
Hi

We have a Cisco 1841 configured for VPN using the Microsoft L2TP/IPSec connection.  This is working at the moment but we want to move over to using the Cisco VPN Client.  

I have the Cisco VPN Client authenticating against our Active Directory, it updates the routing table of the local machine for the 2 networks we have but when you try to ping or connect to any of the hosts behind the Cisco it returns the Public IP address.  So if I ping 192.168.0.20 it replys with the public IP address.

Below is a copy of our config with the passwords and IP addresses removed.  Any help would be greatly appreciated.

version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
!
hostname cisco1841
!
boot-start-marker
boot system flash c1841-advsecurityk9-mz.124-16.bin
boot-end-marker
!
security authentication failure rate 3 log
logging buffered 51200 warnings
no logging console
enable secret 5 #########
!
aaa new-model
!
!
aaa authentication login default group radius local
aaa authentication login CONSOLE local
aaa authentication login userauthen group radius
aaa authentication ppp default group radius local
aaa authorization exec default none
aaa authorization network default if-authenticated
aaa authorization network groupauthor local
!
aaa session-id common
no ip source-route
no ip cef
!
!
ip inspect tcp idle-time 28800
ip inspect name outbound cuseeme
ip inspect name outbound h323
ip inspect name outbound netshow
ip inspect name outbound rcmd
ip inspect name outbound realaudio
ip inspect name outbound rtsp
ip inspect name outbound sqlnet
ip inspect name outbound streamworks
ip inspect name outbound tftp
ip inspect name outbound tcp
ip inspect name outbound vdolive
ip inspect name outbound icmp
no ip dhcp conflict logging
!
!
no ip bootp server
ip domain name domain.local
ip name-server 192.168.0.20
ip name-server 192.168.0.21
vpdn enable
vpdn logging
!
vpdn-group dsi-remote
! Default L2TP VPDN group
 accept-dialin
  protocol l2tp
  virtual-template 1
 local name Teleworker
 no l2tp tunnel authentication
 ip mtu adjust
!
!
async-bootp dns-server 192.168.0.20
async-bootp nbns-server 192.168.0.20
!
!
!
username admin privilege 15 secret 5 ################
!
!
!
!
crypto isakmp policy 1
 encr 3des
 hash md5
 authentication pre-share
 group 2
crypto isakmp key ################## address 0.0.0.0 0.0.0.0
crypto isakmp keepalive 60
!
crypto isakmp client configuration group vpngroup
 key ##################
 dns 192.168.0.20 192.168.0.21
 domain domain.local
 pool ippool
 acl VPN-Split-Tunnel
!
!
crypto ipsec transform-set sitevpn esp-3des esp-md5-hmac
 mode transport
crypto ipsec transform-set myset esp-3des esp-sha-hmac
!
crypto dynamic-map dmap 10
 set transform-set sitevpn
!
!
crypto map clientmap client authentication list default
crypto map clientmap isakmp authorization list groupauthor
crypto map clientmap client configuration address respond
crypto map clientmap 10 ipsec-isakmp dynamic dmap
!
!
!
interface Null0
 no ip unreachables
!
interface FastEthernet0/0
 ip address 192.168.0.253 255.255.255.0
 no ip redirects
 no ip unreachables
 ip nat inside
 ip virtual-reassembly
 ip tcp adjust-mss 1298
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address PublicIP1 255.255.255.240
 ip access-group Firewall in
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip inspect outbound in
 ip inspect outbound out
 ip nat outside
 ip virtual-reassembly
 no ip route-cache
 duplex auto
 speed auto
 no cdp enable
 no mop enabled
 crypto map clientmap
!
interface ATM0/0/0
 no ip address
 shutdown
 no atm ilmi-keepalive
 dsl operating-mode auto
 pvc 0/38
  encapsulation aal5mux ppp dialer
  dialer pool-member 1
 !
!
interface Virtual-Template1
 ip unnumbered FastEthernet0/0
 no ip redirects
 no ip unreachables
 peer default ip address dhcp
 ppp authentication ms-chap-v2 ms-chap callin
!
ip local pool ippool 10.1.1.1 10.1.1.254
ip route 0.0.0.0 0.0.0.0 next-hop
ip route 192.168.254.0 255.255.255.0 192.168.0.254
!
ip http server
ip http secure-server
ip nat inside source list NAT_RULE interface FastEthernet0/1 overload
ip nat inside source static 192.168.0.26 PublicIP2 extendable
!
ip access-list extended Firewall
 permit tcp any host PublicIP2 eq smtp
 permit tcp any host PublicIP2 eq www
 permit tcp any host PublicIP2 eq 443
 remark vpn
 permit udp any eq isakmp host PublicIP1 eq isakmp
 permit esp any host PublicIP1
 permit gre any any
 permit udp any host PublicIP1 eq isakmp
 permit udp any host PublicIP1 eq non500-isakmp
 permit udp any host PublicIP1 eq 1701
 remark ping allow rule
 permit icmp any PublicRange 0.0.0.15 echo
 permit icmp any PublicRange 0.0.0.15 echo-reply
 permit icmp any PublicRange 0.0.0.15 time-exceeded
 permit icmp any PublicRange 0.0.0.15 unreachable
 deny   ip 10.0.0.0 0.255.255.255 any
 deny   ip 172.16.0.0 0.15.255.255 any
 deny   ip 192.168.0.0 0.0.255.255 any
 deny   ip 127.0.0.0 0.255.255.255 any
 deny   ip host 255.255.255.255 any
 deny   ip host 0.0.0.0 any
 deny   ip any any log
ip access-list extended NAT_RULE
 deny   tcp host 192.168.0.26 eq smtp any
 deny   tcp host 192.168.0.26 eq www any
 deny   tcp host 192.168.0.26 eq 443 any
 permit ip 192.168.0.0 0.0.0.255 any
ip access-list extended VPN-Split-Tunnel
 permit ip 192.168.0.0 0.0.0.255 10.0.0.0 0.255.255.255
 permit ip 192.168.254.0 0.0.0.255 10.0.0.0 0.255.255.255
!
!
radius-server host 192.168.0.21 auth-port 1812 acct-port 1813 key #######
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
 login authentication CONSOLE
!
scheduler allocate 20000 1000
end
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Question Stats
Zone: Networking
Question Asked By: chrismenear
Solution Provided By: llyquid
Participating Experts: 1
Solution Grade: A
Views: 55
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08.23.2007 at 04:05PM PDT, ID: 19758587

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08.27.2007 at 12:34PM PDT, ID: 19778003

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08.27.2007 at 08:21PM PDT, ID: 19780197

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08.29.2007 at 05:47AM PDT, ID: 19790625

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