Cisco ASA 5505 - L2TP over IPsec

Posted by xraminx on Server Fault See other posts from Server Fault or by xraminx
Published on 2009-09-15T11:51:10Z Indexed on 2010/04/16 4:03 UTC
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I have followed this document on cisco site to set up the L2TP over IPsec connection.

When I try to establish a VPN to ASA 5505 from my Windows XP, after I click on "connect" button, the "Connecting ...." dialog box appears and after a while I get this error message: Error 800: Unable to establish VPN connection. The VPN server may be unreachable, or security parameters may not be configured properly for this connection.

  • ASA version 7.2(4)
  • ASDM version 5.2(4)
  • Windows XP SP3

Windows XP and ASA 5505 are on the same LAN for test purposes.

Edit 1: There are two VLANs defined on the cisco device (the standard setup on cisco ASA5505). - port 0 is on VLAN2, outside; - and ports 1 to 7 on VLAN1, inside.

  • I run a cable from my linksys home router (10.50.10.1) to the cisco ASA5505 router on port 0 (outside). Port 0 have IP 192.168.1.1 used internally by cisco and I have also assigned the external IP 10.50.10.206 to port 0 (outside).

  • I run a cable from Windows XP to Cisco router on port 1 (inside). Port 1 is assigned an IP from Cisco router 192.168.1.2.

  • The Windows XP is also connected to my linksys home router via wireless (10.50.10.141).

Edit 2: When I try to establish vpn, the Cisco device real time Log viewer shows 7 entries like this:

Severity:5 Date:Sep 15 2009 Time: 14:51:29 SyslogID: 713904 
Destination IP = 10.50.10.141, 
Decription: No crypto map bound to interface... dropping pkt

Edit 3: This is the setup on the router right now.

Result of the command: "show run"

: Saved
:
ASA Version 7.2(4) 
!
hostname ciscoasa
domain-name default.domain.invalid
enable password HGFHGFGHFHGHGFHGF encrypted
passwd NMMNMNMNMNMNMN encrypted
names
name 192.168.1.200 WebServer1
name 10.50.10.206 external-ip-address
!
interface Vlan1
 nameif inside
 security-level 100
 ip address 192.168.1.1 255.255.255.0 
!
interface Vlan2
 nameif outside
 security-level 0
 ip address external-ip-address 255.0.0.0 
!
interface Vlan3
 no nameif
 security-level 50
 no ip address
!
interface Ethernet0/0
 switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
ftp mode passive
dns server-group DefaultDNS
 domain-name default.domain.invalid
object-group service l2tp udp
 port-object eq 1701
access-list outside_access_in remark Allow incoming tcp/http
access-list outside_access_in extended permit tcp any host WebServer1 eq www 
access-list outside_access_in extended permit udp any any eq 1701 
access-list inside_nat0_outbound extended permit ip any 192.168.1.208 255.255.255.240 
access-list inside_cryptomap_1 extended permit ip interface outside interface inside 
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool PPTP-VPN 192.168.1.210-192.168.1.220 mask 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-524.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list inside_nat0_outbound
nat (inside) 1 0.0.0.0 0.0.0.0
static (inside,outside) tcp interface www WebServer1 www netmask 255.255.255.255 
access-group outside_access_in in interface outside
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
http server enable
http 192.168.1.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set TRANS_ESP_3DES_SHA esp-3des esp-sha-hmac 
crypto ipsec transform-set TRANS_ESP_3DES_SHA mode transport
crypto ipsec transform-set TRANS_ESP_3DES_MD5 esp-3des esp-md5-hmac 
crypto ipsec transform-set TRANS_ESP_3DES_MD5 mode transport
crypto map outside_map 1 match address inside_cryptomap_1
crypto map outside_map 1 set transform-set TRANS_ESP_3DES_MD5
crypto map outside_map interface inside
crypto isakmp enable outside
crypto isakmp policy 10
 authentication pre-share
 encryption 3des
 hash md5
 group 2
 lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd auto_config outside
!
dhcpd address 192.168.1.2-192.168.1.33 inside
dhcpd enable inside
!

group-policy DefaultRAGroup internal
group-policy DefaultRAGroup attributes
 dns-server value 192.168.1.1
 vpn-tunnel-protocol IPSec l2tp-ipsec 
username myusername password FGHFGHFHGFHGFGFHF nt-encrypted
tunnel-group DefaultRAGroup general-attributes
 address-pool PPTP-VPN
 default-group-policy DefaultRAGroup
tunnel-group DefaultRAGroup ipsec-attributes
 pre-shared-key *
tunnel-group DefaultRAGroup ppp-attributes
 no authentication chap
 authentication ms-chap-v2
!
!
prompt hostname context 
Cryptochecksum:a9331e84064f27e6220a8667bf5076c1
: end

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