Question

Cisco ASA VPN dynamic-to-static-- tunnel comes up but no traffic

Asked by: NJAMHA

I have a hub-and-spoke VPN set up for one of my clients with one central device, and then different offices with dynamic IP's VPN into the central tunnel.  We have an old PIX 506E currently as the central unit.  We now have acquired an ASA 5510 which needs to be able to accept multiple dynamic connections.  Auth is pre-shared key.  I also have a remote access VPN set up for laptop users on the PIX and would like to have it on the ASA.  

This config wil get the VPN tunnel up, but no traffic passes.  Looking at it in ASDM shows that the remote sites (they're running ASA 5505's) can all pass traffic and they can work fine with the PIX 506E, so I don't think they're the problem.  No traffic gets transmitted from the central site back to them, and I get a lot of 'DNS query denied' errors in ASDM logging.  

COnfig is below.  Any ideas? 

Result of the command: "sh run"
 
: Saved
:
ASA Version 8.2(1) 
!
hostname XXXASA
domain-name XXXX.org
enable password XXXX encrypted
passwd XXXXXXX encrypted
names
name 192.168.204.0 House1 description House1
name 192.168.203.0 House2 description House2
name 192.168.201.0 House3 description House3
name 192.168.195.0 Remote_Access description Remote Access Clients
name 192.168.220.0 House4 description House4
!
interface Ethernet0/0
 nameif outside
 security-level 0
 ip address X.X.X.X 
!
interface Ethernet0/1
 nameif inside
 security-level 100
 ip address 192.168.202.1 255.255.255.0 
!
interface Ethernet0/2
 shutdown
 no nameif
 no security-level
 no ip address
!
interface Ethernet0/3
 shutdown
 no nameif
 no security-level
 no ip address
!
interface Management0/0
 nameif management
 security-level 100
 ip address 192.168.205.1 255.255.255.0 
 management-only
!
ftp mode passive
dns domain-lookup inside
dns domain-lookup management
dns server-group DefaultDNS
 name-server 192.168.202.X
 domain-name XXX.org
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object-group service SMTPandHTTPSForExchange tcp
 port-object eq https
 port-object eq smtp
object-group network DM_INLINE_NETWORK_1
 network-object Remote_Access 255.255.255.0
 network-object House3 255.255.255.0
 network-object House2 255.255.255.0
 network-object House1 255.255.255.0
 network-object House4 255.255.255.0
 network-object 192.168.0.0 255.255.255.0
object-group network DM_INLINE_NETWORK_2
 network-object 192.168.0.0 255.255.255.0
 network-object House3 255.255.255.0
 network-object House2 255.255.255.0
 network-object House1 255.255.255.0
 network-object House4 255.255.255.0
object-group network DM_INLINE_NETWORK_4
 network-object 192.168.0.0 255.255.255.0
 network-object Remote_Access 255.255.255.0
 network-object House3 255.255.255.0
 network-object House2 255.255.255.0
 network-object House1 255.255.255.0
 network-object House4 255.255.255.0
object-group protocol TCPUDP
 protocol-object udp
 protocol-object tcp
object-group network DM_INLINE_NETWORK_5
 network-object 192.168.0.0 255.255.255.0
 network-object House3 255.255.255.0
 network-object House2 255.255.255.0
 network-object House1 255.255.255.0
 network-object House4 255.255.255.0
access-list outside_access_in extended permit tcp any host 192.168.202.X object-group SMTPandHTTPSForExchange 
access-list outside_access_in extended permit ip object-group DM_INLINE_NETWORK_4 192.168.202.0 255.255.255.0 
access-list outside_access_in extended permit ip House2 255.255.255.0 any 
access-list outside_access_in extended permit ip House2 255.255.255.0 192.168.202.0 255.255.255.0 
access-list outside_access_in extended permit ip 192.168.202.0 255.255.255.0 House2 255.255.255.0 
access-list outside_access_in extended permit ip 192.168.202.0 255.255.255.0 object-group DM_INLINE_NETWORK_4 
access-list outside_cryptomap_65535.1 extended permit ip 192.168.202.0 255.255.255.0 object-group DM_INLINE_NETWORK_1 
access-list Remote_Access_Users_splitTunnelAcl standard permit 192.168.202.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip 192.168.202.0 255.255.255.0 Remote_Access 255.255.255.192 
access-list inside_nat0_outbound extended permit ip 192.168.202.0 255.255.255.0 object-group DM_INLINE_NETWORK_2 
access-list REMOTE_SITE extended permit ip 192.168.202.0 255.255.255.0 House3 255.255.255.0 
access-list REMOTE_SITE extended permit ip 192.168.202.0 255.255.255.0 House2 255.255.255.0 
access-list REMOTE_SITE extended permit ip 192.168.202.0 255.255.255.0 House1 255.255.255.0 
access-list REMOTE_SITE extended permit ip 192.168.202.0 255.255.255.0 House4 255.255.255.0 
access-list outside_cryptomap_20.1 extended permit ip 192.168.202.0 255.255.255.0 House2 255.255.255.0 
access-list outside_cryptomap_20.1 extended permit ip House2 255.255.255.0 192.168.202.0 255.255.255.0 
access-list inside_access_in extended permit ip any any 
access-list inside_access_in_1 extended permit ip any any 
access-list inside_access_in_1 extended permit ip 192.168.202.0 255.255.255.0 any 
access-list PERMISSIVE extended permit ip any any 
access-list PERMISSIVE extended permit ip 192.168.202.0 255.255.255.0 any 
access-list PERMISSIVE extended permit ip House2 255.255.255.0 any 
access-list outside_access_in_1 extended permit tcp any host 192.168.202.4 object-group SMTPandHTTPSForExchange 
access-list outside_access_in_1 extended permit ip object-group DM_INLINE_NETWORK_5 any 
access-list outside_access_in_1 extended permit ip House2 255.255.255.0 192.168.202.0 255.255.255.0 
pager lines 24
logging enable
logging asdm informational
mtu outside 1500
mtu inside 1500
mtu management 1500
ip local pool triplecvpn 192.168.195.10-192.168.195.50 mask 255.255.255.0
no failover
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
nat-control
global (outside) 101 interface
nat (inside) 0 access-list REMOTE_SITE
nat (inside) 101 0.0.0.0 0.0.0.0
static (inside,outside) 72.44.171.3 192.168.202.4 netmask 255.255.255.255 
access-group outside_access_in_1 in interface outside
access-group PERMISSIVE in interface inside
route outside 0.0.0.0 0.0.0.0 72.44.171.1 1
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
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 192.168.205.0 255.255.255.0 management
http 192.168.202.0 255.255.255.0 inside
http 192.168.202.10 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac 
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac 
crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac 
crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac 
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac 
crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac 
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac 
crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac 
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac 
crypto ipsec transform-set aes128 esp-aes esp-md5-hmac 
crypto ipsec transform-set myset esp-aes esp-md5-hmac 
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac 
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map cisco 1 match address outside_cryptomap_20.1
crypto dynamic-map cisco 1 set pfs group5
crypto dynamic-map cisco 1 set transform-set ESP-AES-128-MD5 aes128 myset
crypto dynamic-map cisco 1 set reverse-route
crypto map dyn-map 20 ipsec-isakmp dynamic cisco
crypto map dyn-map interface outside
crypto isakmp enable outside
crypto isakmp policy 30000
 authentication pre-share
 encryption aes
 hash md5
 group 5
 lifetime 86000
crypto isakmp policy 50000
 authentication pre-share
 encryption aes
 hash md5
 group 2
 lifetime 86400
telnet timeout 5
ssh timeout 5
ssh version 1
console timeout 0
dhcpd address 192.168.202.100-192.168.202.250 inside
dhcpd dns 192.168.202.10 192.168.202.10 interface inside
dhcpd enable inside
!
dhcpd address 192.168.205.2-192.168.205.254 management
dhcpd enable management
!
threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
group-policy DfltGrpPolicy attributes
 vpn-filter value outside_cryptomap_20.1
group-policy Remote_Access_Users internal
group-policy Remote_Access_Users attributes
 dns-server value 192.168.202.10 192.168.202.3
 vpn-tunnel-protocol IPSec webvpn
 split-tunnel-policy tunnelspecified
 split-tunnel-network-list value Remote_Access_Users_splitTunnelAcl
 default-domain value triplechousing.org
tunnel-group DefaultL2LGroup ipsec-attributes
 pre-shared-key *
 peer-id-validate nocheck
tunnel-group Remote_Access_Users type remote-access
tunnel-group Remote_Access_Users general-attributes
 address-pool triplecvpn
 default-group-policy Remote_Access_Users
tunnel-group Remote_Access_Users ipsec-attributes
 pre-shared-key *
 isakmp ikev1-user-authentication none
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map 
  inspect ftp 
  inspect h323 h225 
  inspect h323 ras 
  inspect rsh 
  inspect rtsp 
  inspect esmtp 
  inspect sqlnet 
  inspect skinny  
  inspect sunrpc 
  inspect xdmcp 
  inspect sip  
  inspect netbios 
  inspect tftp 
!
service-policy global_policy global
prompt hostname context 
Cryptochecksum:a52f002341723ad90c782e62b3ef55c9
: end

                                  
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Asked On
2009-09-11 at 14:19:39ID24725964
Tags

ASA

,

5510

,

upgrade

,

VPN

,

IPSEC

,

IKE

Topic

Virtual Private Networking (VPN)

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: geergonPosted on 2009-09-12 at 21:58:32ID: 25318994

Hello !

What do you see in the output of the IPsec sa?
"Show crypto ipsec sa"

You are using a filter.... right?
group-policy DfltGrpPolicy attributes
 vpn-filter value outside_cryptomap_20.1

Remember the implicit deny... for now just delete the filter...


You are missing the "NAT cero" for VPN clients...
access-list REMOTE_SITE extended permit ip 192.168.202.0 255.255.255.0 Remote_Access 255.255.255.0

For best practices I do not recommend you the usage of group 5 if you are using simple L2L or remote IPsec connections.


 

by: NJAMHAPosted on 2009-09-17 at 08:42:51ID: 25357447

That did it, along with fiddling with the cryptomaps a bit (I think I had it backwards).

Why is group2 a best practice for L2L tunnels?  I thought AES required group5.

 

by: geergonPosted on 2009-09-17 at 18:20:05ID: 25362416

Group 5 is most used with RSA digital certificate implementations for remote clients....
Sorry I confused the  types of VPN for a moment...

:-)

Remote clients do not support group 5 with pre-shared keys.
http://www.cisco.com/en/US/docs/security/vpn_client/cisco_vpn_client/vpn_client500_501/administration/5vcAch11.html#wp1157757

but you can used it for L2L if you want.
thank you
bye.

20120131-EE-VQP-002

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