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Cant Access to network segments through VPN client remote Access ASA 5555

Omar Valverde
Level 1
Level 1

Hi everyone!

My story is little bit complicated…

The remote users that connects through the VPN client need to reach inside networks, but these cant have access.

 

I have three network inside segments 192.168.240.0/24, 192.168.252.0/24 and 192.168.254.0/24

And the VPN pool I configure on ASA is 128.36.38.0/24.

On my inside environment I connect a host and I can ping to whatever host on the inside. This is made by a Switch Core that is configured with InterVLAN routing, each network has its own gateway, but when I connect my VPN Pool users they can’t have access to those inside networks.

I attach some pictures from a VPN remote user, and you could see some time a ping done to 192.168.254.12…that was because on the 192.168.254.12 host I configured a static route to network 128.36.38.0/24, but that is not a good solution I guess… I think I am missing some NAT or Access.list or Split tunneling but I have tried everything I found on Cisco Support and doesnt work on my config L Do you guys know if I am missing something?

One thing is…if I config management-access INSIDE I can ping to ASA Inside interface

Another question is…why do I have a Default Gateway on remote user? I didnt configure a default Gateway on it

Please help :/

FW1# sho running-config
: Saved
:
ASA Version 9.1(3)
!
hostname FW1
enable password 8Ry2YjIyt7RRXU24 encrypted
names
ip local pool VPN-POOL-RU 128.36.38.1-128.36.38.254
!
interface GigabitEthernet0/0
speed 100
nameif OUTSIDE
security-level 0
ip address 1.1.1.1 255.255.255.252
!
interface GigabitEthernet0/1
speed 100
nameif INSIDE
security-level 100
ip address 192.168.254.103 255.255.255.0
!
interface GigabitEthernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
!
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 GigabitEthernet0/6
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/7
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
!
ftp mode passive
pager lines 24
logging asdm informational
mtu management 1500
mtu OUTSIDE 1500
mtu INSIDE 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
route OUTSIDE 0.0.0.0 0.0.0.0 1.1.1.2 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
http server enable
http 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec ikev1 transform-set TRANSF-SET esp-3des esp-md5-hmac
crypto ipsec security-association pmtu-aging infinite
crypto dynamic-map OUTSIDE-DYN-MAP 100 set ikev1 transform-set TRANSF-SET
crypto dynamic-map OUTSIDE-DYN-MAP 100 set reverse-route
crypto map MY-MAP 100 ipsec-isakmp dynamic OUTSIDE-DYN-MAP
crypto map MY-MAP interface OUTSIDE
crypto ca trustpool policy
crypto ikev1 enable OUTSIDE
crypto ikev1 ipsec-over-tcp port 10000
crypto ikev1 policy 100
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 43200
telnet timeout 5
ssh timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0
management-access INSIDE
dhcpd address 192.168.1.2-192.168.1.254 management
dhcpd enable management
!
!
tls-proxy maximum-session 1000
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
anyconnect-essentials
username ovalver password edKqkLC7z68MPPIy encrypted
tunnel-group TG type remote-access
tunnel-group TG general-attributes
address-pool VPN-POOL-RU
tunnel-group TG 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
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:1c5e65a06dda99c9ef417b20d3b8637d
: end
FW1#

3 Replies 3

Ajay Saini
Level 7
Level 7

2 things that come to my mind are:

1) configure split tunnel so that only selected routes (networks actually behind the ASA and routed by Core Switch) are sent to the tunnel and rest of internet traffic does not come to the ASA.

2) Make sure that the core switch and any other layer3 devices in your networks understand the vpn pool ip network so that internal routing is not an issue.

http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/70917-asa-split-tunnel-vpn-client.html

HTH

-AJ

Hi Ajay,

Thanks for your comment,

Let me take a look on that document and I will reply.

Omar

Hi Ajay

Now is working, very pleasent moment when ping works to INSIDE nets... :))

I follow up the document you reply and add a routes on ASA, my Gateway to this network (192.168.254.0) is 192.168.254.253; I can ping 192.168.240.0/24 and 192.168.252.0/24, but you know what, I can't ping 192.168.254.0/24, that network is the same net ASA have as an INSIDE and when I add route INSIDE 192.168.254.0 255.255.255.0 192.168.254.253 1 the ASA doesn't allow that, so I can't ping the whole 192.168.254.0/24 :/

The lines I add were:

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
access-list SPLIT-TUNNEL-LIST remark CORPORATE-NETS
access-list SPLIT-TUNNEL-LIST standard permit 192.168.252.0 255.255.255.0
access-list SPLIT-TUNNEL-LIST standard permit 192.168.254.0 255.255.255.0
access-list SPLIT-TUNNEL-LIST standard permit 192.168.240.0 255.255.255.0
route INSIDE 192.168.240.0 255.255.255.0 192.168.254.253 1
route INSIDE 192.168.252.0 255.255.255.0 192.168.254.253 1
group-policy TEST-GPOL internal
group-policy TEST-GPOL attributes
split-tunnel-policy tunnelspecified
split-tunnel-network-list value SPLIT-TUNNEL-LIST
And below this config line ->tunnel-group TG general-attributes:
default-group-policy TEST-GPOL

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

FW1# sho running-config
: Saved
:
ASA Version 9.1(3)
!
hostname FW1
enable password 8Ry2YjIyt7RRXU24 encrypted
names
ip local pool VPN-POOL-RU 128.36.38.1-128.36.38.254
!
interface GigabitEthernet0/0
speed 100
nameif OUTSIDE
security-level 0
ip address 1.1.1.1 255.255.255.252
!
interface GigabitEthernet0/1
speed 100
nameif INSIDE
security-level 100
ip address 192.168.254.103 255.255.255.0
!
interface GigabitEthernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
!
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 GigabitEthernet0/6
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/7
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
!
ftp mode passive
access-list SPLIT-TUNNEL-LIST remark CORPORATE-NETS
access-list SPLIT-TUNNEL-LIST standard permit 192.168.252.0 255.255.255.0
access-list SPLIT-TUNNEL-LIST standard permit 192.168.254.0 255.255.255.0
access-list SPLIT-TUNNEL-LIST standard permit 192.168.240.0 255.255.255.0
pager lines 24
logging asdm informational
mtu OUTSIDE 1500
mtu INSIDE 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
route OUTSIDE 0.0.0.0 0.0.0.0 1.1.1.2 1
route INSIDE 192.168.240.0 255.255.255.0 192.168.254.253 1
route INSIDE 192.168.252.0 255.255.255.0 192.168.254.253 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
http server enable
http 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
crypto ipsec ikev1 transform-set TRANSF-SET esp-3des esp-md5-hmac
crypto ipsec security-association pmtu-aging infinite
crypto dynamic-map OUTSIDE-DYN-MAP 100 set ikev1 transform-set TRANSF-SET
crypto dynamic-map OUTSIDE-DYN-MAP 100 set reverse-route
crypto map MY-MAP 100 ipsec-isakmp dynamic OUTSIDE-DYN-MAP
crypto map MY-MAP interface OUTSIDE
crypto ca trustpool policy
crypto ikev1 enable OUTSIDE
crypto ikev1 ipsec-over-tcp port 10000
crypto ikev1 policy 100
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 43200
telnet timeout 5
ssh timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0
management-access INSIDE
dhcpd address 192.168.1.2-192.168.1.24 management
dhcpd enable management
!
!
tls-proxy maximum-session 1000
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
anyconnect-essentials
group-policy TEST-GPOL internal
group-policy TEST-GPOL attributes
split-tunnel-policy tunnelspecified
split-tunnel-network-list value SPLIT-TUNNEL-LIST
username ovalver password edKqkLC7z68MPPIy encrypted
tunnel-group TG type remote-access
tunnel-group TG general-attributes
address-pool VPN-POOL-RU
default-group-policy TEST-GPOL
tunnel-group TG 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
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:c2507f290235ce9f1d415a6a81ab0dd0
: end
FW1#

Shall I add a NAT or something to reach the hosts on 192.168.254.0/24?

Thanks in advance :)

Omar