Unable to access internal networks over Remote acces VPN

mohanish12 · ‎11-16-2014

Hi,

I have set up a Remote access VPN from Home to Cisco ASA 5512-X.

I am able to connect successfully and even getting a valid IP address from VPN pool 172.21.3.1-. However I am unable to access any of the internal resources.

Internal Network: 172.20.0.0 255.255.0.0

Please if someone can help identifying the issue.

Below is the running config:-

Result of the command: "sh run"

: Saved
:
ASA Version 9.1(1)
!
hostname ASA
domain-name M8fl.com
enable password Aoz9GlxLLvkWrTUy encrypted
passwd Gc1jA6zbgOsj63RW encrypted
names
ip local pool vpnclients 172.21.3.1-172.21.3.20 mask 255.255.0.0
ip local pool test 172.21.3.21-172.21.3.40 mask 255.255.255.0
!

interface GigabitEthernet0/1
nameif inside
security-level 100
ip address 172.20.254.250 255.255.0.0
!
interface GigabitEthernet0/2
description vodafone 100mb internet 195.11.180.40_29
speed 100
duplex full
nameif outside1
security-level 1
ip address 195.11.180.42 255.255.255.248
!
interface GigabitEthernet0/3
description Voice
nameif Voice
security-level 80
ip address 192.168.2.1 255.255.255.252
!
interface GigabitEthernet0/4
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/5
shutdown
no nameif
no security-level
no ip address
!
interface Management0/0
management-only
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
!
boot system disk0:/asa911-smp-k8.bin
ftp mode passive
clock timezone GMT 0
dns domain-lookup inside
dns domain-lookup outside1
dns domain-lookup management
dns server-group DefaultDNS
name-server 10.0.0.4
name-server 172.20.0.100
domain-name M8fl.com
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object network VLAN1
subnet 172.20.0.0 255.255.0.0
object network NETWORK_OBJ_172.20.3.0_27
subnet 172.21.3.0 255.255.255.224
object network Voice_Net
subnet 172.21.20.0 255.255.255.0
object network PBX_Internal
host 192.168.2.2
description PBX Internal
object network Voice_External
host 195.11.180.43
description For PBX
object network Raith_Remote_Network
subnet 192.168.20.0 255.255.255.0
description Raith Remote Network
object network NETWORK_OBJ_172.21.3.0_27
subnet 172.21.3.0 255.255.255.224
object network NETWORK_OBJ_172.21.3.0_26
subnet 172.21.3.0 255.255.255.192
object-group network azure-networks
network-object 10.0.0.0 255.0.0.0
object-group network onprem-networks
network-object 172.20.0.0 255.255.0.0
object-group protocol TCPUDP
protocol-object udp
protocol-object tcp
object-group service test_PPTP
service-object ip
service-object tcp destination eq pptp
access-list azure-vpn-acl extended permit ip object-group onprem-networks object-group azure-networks
access-list outside_access_in extended permit ip object-group azure-networks object-group onprem-networks
access-list outside_access_in extended permit icmp any any
access-list outside_access_in extended permit ip any any
access-list inside_access_in extended permit ip any any log disable
access-list inside_access_in_1 extended permit ip object-group onprem-networks object-group azure-networks
access-list inside_access_in_1 extended permit ip any object Voice_Net log debugging
access-list inside_access_in_1 extended permit ip any any
access-list outside_access_in_1 extended permit ip object-group azure-networks object-group onprem-networks
access-list outside_access_in_1 extended permit icmp any any
access-list outside_access_in_1 extended permit ip any any inactive
access-list Voice_access_in extended permit ip any any log debugging
access-list outside_cryptomap extended permit ip object-group onprem-networks object Raith_Remote_Network
pager lines 24
logging enable
logging buffer-size 40000
logging buffered notifications
logging asdm debugging
mtu outside 1500
mtu inside 1500
mtu outside1 1500
mtu Voice 1500
mtu management 1500
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-66114.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
nat (inside,outside1) source static onprem-networks onprem-networks destination static azure-networks azure-networks
nat (inside,outside1) source dynamic VLAN1 interface
nat (inside,Voice) source static VLAN1 VLAN1 destination static Voice_Net Voice_Net no-proxy-arp route-lookup
nat (Voice,outside1) source static PBX_Internal Voice_External
nat (inside,outside) source static onprem-networks onprem-networks destination static Raith_Remote_Network Raith_Remote_Network no-proxy-arp route-lookup
nat (inside,outside1) source static any any destination static NETWORK_OBJ_172.21.3.0_27 NETWORK_OBJ_172.21.3.0_27 no-proxy-arp route-lookup
nat (inside,outside1) source static any any destination static NETWORK_OBJ_172.21.3.0_26 NETWORK_OBJ_172.21.3.0_26 no-proxy-arp route-lookup
access-group outside_access_in in interface outside
access-group inside_access_in_1 in interface inside
access-group outside_access_in_1 in interface outside1
access-group Voice_access_in in interface Voice
route outside1 0.0.0.0 0.0.0.0 195.11.180.41 10
route inside 172.21.20.0 255.255.255.0 172.20.20.253 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
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
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
aaa authentication ssh console LOCAL
aaa authentication http console LOCAL
http server enable 444
http 192.168.1.0 255.255.255.0 management
http 172.20.0.0 255.255.0.0 inside

no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
sysopt connection tcpmss 1350
sysopt noproxyarp outside
crypto ipsec ikev1 transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec ikev1 transform-set ESP-DES-SHA esp-des esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec ikev1 transform-set azure-ipsec-proposal-set esp-aes-256 esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec ikev1 transform-set ESP-3DES-SHA mode transport
crypto ipsec ikev2 ipsec-proposal DES
protocol esp encryption des
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal 3DES
protocol esp encryption 3des
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES
protocol esp encryption aes
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES192
protocol esp encryption aes-192
protocol esp integrity sha-1 md5
crypto ipsec ikev2 ipsec-proposal AES256
protocol esp encryption aes-256
protocol esp integrity sha-1 md5
crypto ipsec security-association lifetime seconds 3600
crypto ipsec security-association lifetime kilobytes 102400000
crypto ipsec security-association pmtu-aging infinite
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set ikev1 transform-set ESP-3DES-SHA
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set security-association lifetime seconds 28800
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set security-association lifetime kilobytes 4608000

crypto map outside_map interface outside
crypto ca trustpoint ASDM_TrustPoint0
enrollment terminal
subject-name CN=ASA
crl configure
crypto ca trustpool policy

crypto ikev2 policy 1
encryption aes-256
integrity sha
group 5 2
prf sha
lifetime seconds 86400
crypto ikev2 policy 10
encryption aes-256
integrity sha
group 5 2
prf sha
lifetime seconds 28800
crypto ikev2 policy 20
encryption aes
integrity sha
group 5 2
prf sha
lifetime seconds 86400
crypto ikev2 policy 30
encryption 3des
integrity sha
group 5 2
prf sha
lifetime seconds 86400
crypto ikev2 policy 40
encryption des
integrity sha
group 5 2
prf sha
lifetime seconds 86400
crypto ikev2 enable outside
crypto ikev1 enable outside
crypto ikev1 enable outside1
crypto ikev1 policy 10
authentication pre-share
encryption aes-256
hash sha
group 2
lifetime 28800
crypto ikev1 policy 20
authentication rsa-sig
encryption aes-256
hash sha
group 2
lifetime 86400
crypto ikev1 policy 30
authentication pre-share
encryption aes-256
hash sha
group 2
lifetime 86400
crypto ikev1 policy 40
authentication crack
encryption aes-192
hash sha
group 2
lifetime 86400
crypto ikev1 policy 50
authentication rsa-sig
encryption aes-192
hash sha
group 2
lifetime 86400
crypto ikev1 policy 60
authentication pre-share
encryption aes-192
hash sha
group 2
lifetime 86400
crypto ikev1 policy 70
authentication crack
encryption aes
hash sha
group 2
lifetime 86400
crypto ikev1 policy 80
authentication rsa-sig
encryption aes
hash sha
group 2
lifetime 86400
crypto ikev1 policy 90
authentication pre-share
encryption aes
hash sha
group 2
lifetime 86400
crypto ikev1 policy 100
authentication crack
encryption 3des
hash sha
group 2
lifetime 86400
crypto ikev1 policy 110
authentication rsa-sig
encryption 3des
hash sha
group 2
lifetime 86400
crypto ikev1 policy 120
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto ikev1 policy 130
authentication crack
encryption des
hash sha
group 2
lifetime 86400
crypto ikev1 policy 140
authentication rsa-sig
encryption des
hash sha
group 2
lifetime 86400
crypto ikev1 policy 150
authentication pre-share
encryption des
hash sha
group 2
lifetime 86400
telnet 172.20.0.0 255.255.0.0 inside
telnet timeout 5

ssh 172.20.0.0 255.255.0.0 inside

ssh timeout 5
ssh version 2
console timeout 0
dhcpd address 172.20.2.1-172.20.2.254 inside
dhcpd dns 10.0.0.4 172.20.0.100 interface inside
dhcpd enable inside
!
dhcpd dns 172.21.20.254 interface Voice
!
dhcpd address 192.168.1.2-192.168.1.254 management
dhcpd enable management
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
tftp-server inside 172.20.2.34 /tftp
webvpn
enable outside1
anyconnect image disk0:/anyconnect-win-2.5.2014-k9.pkg 1
anyconnect image disk0:/anyconnect-linux-2.5.2014-k9.pkg 2
anyconnect image disk0:/anyconnect-macosx-i386-2.5.2014-k9.pkg 3
anyconnect enable
tunnel-group-list enable
internal-password enable
group-policy DefaultRAGroup_2 internal
group-policy DefaultRAGroup_2 attributes
dns-server value 10.0.0.4 172.20.0.100
vpn-tunnel-protocol l2tp-ipsec
default-domain value
group-policy DefaultRAGroup_3 internal
group-policy DefaultRAGroup_3 attributes
dns-server value 10.0.0.4 172.20.0.100
vpn-tunnel-protocol ikev1 l2tp-ipsec
default-domain value
group-policy DefaultRAGroup internal
group-policy DefaultRAGroup attributes
dns-server value 10.0.0.4 172.20.0.100
vpn-tunnel-protocol l2tp-ipsec
default-domain value
group-policy DefaultRAGroup_1 internal
group-policy DefaultRAGroup_1 attributes
dns-server value 10.0.0.4 172.20.0.100
vpn-tunnel-protocol l2tp-ipsec
default-domain value
group-policy DfltGrpPolicy attributes
vpn-tunnel-protocol ikev1 l2tp-ipsec ssl-client ssl-clientless
group-policy RA_VPN internal
group-policy RA_VPN attributes
dns-server value 8.8.8.8 4.2.2.2
vpn-tunnel-protocol ikev1
default-domain value
group-policy "GroupPolicy_Anyconnect _profile" internal
group-policy "GroupPolicy_Anyconnect _profile" attributes
wins-server none
dns-server value 8.8.8.8
vpn-tunnel-protocol ssl-client ssl-clientless
default-domain none
webvpn
file-browsing enable
group-policy GroupPolicy_89.241.208.14 internal
group-policy GroupPolicy_89.241.208.14 attributes
vpn-tunnel-protocol ikev1
username test2 password encrypted privilege 15
username test1 password nt-encrypted privilege 0
username test1 attributes
vpn-group-policy DefaultRAGroup_2
username test password encrypted privilege 15
username test attributes
vpn-group-policy DefaultRAGroup_1
username EdwardM password encrypted privilege 15
username vpntest password encrypted privilege 0
username vpntest attributes
vpn-group-policy RA_VPN
username vpntest3 password nt-encrypted privilege 15
username vpntest3 attributes
service-type remote-access
username rhunton password encrypted privilege 15
username rhunton attributes
service-type admin
username e.melaugh password encrypted privilege 15
username netx password encrypted privilege 15
username netx attributes
service-type remote-access
username colin password encrypted privilege 15
username colin attributes
service-type remote-access
tunnel-group DefaultL2LGroup ipsec-attributes
ikev1 pre-shared-key *****
tunnel-group DefaultRAGroup general-attributes
address-pool vpnclients
default-group-policy DefaultRAGroup_3
tunnel-group DefaultRAGroup ipsec-attributes
ikev1 pre-shared-key *****
isakmp keepalive disable
tunnel-group DefaultRAGroup ppp-attributes
no authentication chap
authentication ms-chap-v2
tunnel-group "Anyconnect _profile" type remote-access
tunnel-group "Anyconnect _profile" general-attributes
address-pool vpnclients
default-group-policy "GroupPolicy_Anyconnect _profile"
tunnel-group "Anyconnect _profile" webvpn-attributes
group-alias "Anyconnect _profile" enable
tunnel-group 137.117.215.177 type ipsec-l2l
tunnel-group 137.117.215.177 ipsec-attributes
ikev1 pre-shared-key *****
peer-id-validate nocheck
isakmp keepalive disable
tunnel-group 89.241.208.14 type ipsec-l2l
tunnel-group 89.241.208.14 general-attributes
default-group-policy GroupPolicy_89.241.208.14
tunnel-group 89.241.208.14 ipsec-attributes
ikev1 pre-shared-key *****
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
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
inspect ip-options
inspect pptp
policy-map type inspect ipsec-pass-thru Fairhurst
description to allow vpn to fairhurst network
parameters
esp
ah
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:f4185106b309478da7804dc22d2c1a85
: end

niemmanu · ‎11-16-2014

Hi,

You seem to have this nat (inside,outside1) source dynamic VLAN1 interface at line 2 which is causing the identity Nat/ Nat exempt to fail.

It is always good to use the packet tracer feature on the ASA to see what exactly is happening.

Try this

nat (inside,outside1) 1 source static VLAN1 VLAN1 destination static NETWORK_OBJ_172.21.3.0_27 NETWORK_OBJ_172.21.3.0_27 no-pr route-lo

Let me know how it goes for you.

Regards,

Nitish Emmanuel

mohanish12 · ‎11-16-2014

Hi Nitish,

Thanks for the reply.

I will try this out and let you know.

I had one more issue. When connected to the VPN my internet goes for a toss.

I didnt enabled split tunneling while creating the VPN.

I am using a Windows VPn client to connect to VPN. I read on the internet that when using Windows client split tunneling shouldnt be enabled. Please let me know how to go about this.

Thanks and Regards

Mohanish Mahajan

niemmanu · ‎02-03-2015

Hi,

It is possible to configure split tunneling.

here is the document/discussion on it please go through it

https://supportforums.cisco.com/discussion/10812051/windows-l2tp-vpn-clients-no-internet-access-split-tunnel-not-working

FlorianCokl · ‎10-08-2016

Hi Mohanish

still an existing issue? Where you able to resolve it?

Hint: NAT - many forget to include a NAT-exempt-rule (former no-NAT-rule) i.e. traffic from your inside LAN(s) to the Remote-Access-VPN-LAN(s) must not be NATed.

Make sure this NAT-exempt-rule is at the very top of all your NAT-rules -> hint: acl-like behavior.