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8.0

Cisco ASA VPN Configuration Issue

Asked by cheeky-monkey in MS Forefront-ISA, Networking Hardware Firewalls, Cisco PIX Firewall

Tags: Cisco, ASA, 5510

We have a Cisco ASA and an ISA server setup as shown in the attached network (testing network.gif). We are attempting to get VPN clients to connect to the Internal network. VPN is being terminated at the external interface of the ASA. From the ASA we are trying to get the VPN client to access the Windows 2008 Server on the Internal Network.

In the attached config of the ASA (config1.txt) I have successfully setup a VPN on the ASA and the VPN client is successfully able to access the Windows 2003 Server located in the DMZ network between the ASA and ISA. That same server is also able to access the Windows 2008 Server located on the Internal Network. This suggests that rules I have setup are fine for the ISA server (I have just added the VPN range of IP addresses to these rules).

Now I have changed the ASA config a bit so that I can attempt to get the VPN client to access the Internal network and the Windows 2008 Server. The current config is attached (config2.txt). I am unable to get the VPN client to access the Windows 2008 Server on the Internal Network. I might also add that when I monitor traffic on the ISA server, I do not see any DIRECT traffic from the VPN client hitting the ISA servers external interface, either an accepted or denied connection.

Can anyone suggest what might be missing from our ASA configuration so that ALL VPN TRAFFIC is forwarded to our ISA server? 
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---------- Config. 1 -------------------------------------
 
: Saved
: Written by enable_15 at 11:08:36.359 EST Tue Jul 1 2008
!
ASA Version 7.0(7) 
!
hostname SYDASA01
domain-name domain.com
enable password XXXX encrypted
names
name X.X.X.X GXS_Server description GXS VPN Server
name 172.16.16.1 ISA_Server description Internal ISA Server
dns-guard
!
interface Ethernet0/0
 description UNUSED Connection
 shutdown
 nameif outside1
 security-level 0
 ip address X.X.X.X 255.255.255.252 
!
interface Ethernet0/1
 description Internet Connection
 nameif outside2
 security-level 0
 ip address X.X.X.X 255.255.255.252 
!
interface Ethernet0/2
 description Internal (DMZ Network)
 nameif inside
 security-level 100
 ip address 172.16.16.2 255.255.255.0 
!
interface Management0/0
 description Management Port Only
 nameif management
 security-level 0
 ip address 10.10.10.1 255.255.255.248 
 management-only
!
passwd XXXX encrypted
ftp mode passive
clock timezone EST 10
clock summer-time EDT recurring last Sun Oct 2:00 last Sun Mar 3:00
object-group service WebAccess tcp
 description HTTP/HTTPS access
 port-object eq www
 port-object eq https
object-group service DNS tcp-udp
 description DNS Group
 port-object range domain domain
object-group service GXS_TCP tcp
 description Group for GXS TCP Protocols
 port-object range 264 264
object-group service GXS_UDP udp
 description Group for GXS UDP Protocols
 port-object range 2746 2746
 port-object range isakmp isakmp
access-list outside2_access_in remark Allow Inbound HTTP Access to ISA Server only.
access-list outside2_access_in extended permit tcp any interface outside2 eq www 
access-list outside2_access_in remark Allow Inbound SMTP (TCP 25) Access to ISA Server only.
access-list outside2_access_in extended permit tcp any eq smtp interface outside2 eq smtp 
access-list outside2_access_in remark Allow Inbound HTTPS (TCP 443) Access to ISA Server only.
access-list outside2_access_in extended permit tcp any interface outside2 eq https 
access-list inside_access_in remark Allow SMTP Outbound (TCP 25) from ISA Server only.
access-list inside_access_in extended permit tcp host ISA_Server any eq smtp 
access-list inside_access_in remark Allow DNS Outbound (UDP 53) from ISA Server only.
access-list inside_access_in extended permit udp host 172.16.16.10 any eq domain 
access-list inside_access_in remark Allow Web Access Outbound (HTTP/HTTPS) from ISA Server only.
access-list inside_access_in extended permit tcp 172.16.16.0 255.255.255.0 any object-group WebAccess 
access-list inside_access_in remark Allow Outbound FTP (TCP 23) from ISA Server only.
access-list inside_access_in extended permit tcp host ISA_Server any eq ftp 
access-list inside_access_in remark Allow NTP Outbound (UDP 123) from ISA Server only.
access-list inside_access_in extended permit udp host ISA_Server any eq ntp 
access-list inside_access_in remark Allow Outbound GXS VPN Connection TCP Rule (TCP 264) from ISA Server only.
access-list inside_access_in extended permit tcp host ISA_Server host GXS_Server object-group GXS_TCP 
access-list inside_access_in remark Allow Outbound GXS VPN Connection UDP Rule (UDP 500/2746) from ISA Server only.
access-list inside_access_in extended permit udp host ISA_Server host GXS_Server object-group GXS_UDP 
access-list inside_access_in extended permit ip 172.16.16.0 255.255.255.0 192.168.118.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip any 172.16.16.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip 172.16.16.0 255.255.255.0 192.168.118.0 255.255.255.0 
pager lines 24
logging enable
logging timestamp
logging asdm informational
logging from-address sydasa01@domain.com
logging recipient-address administrator@domain.com level errors
logging device-id hostname
logging host inside 192.168.18.67
mtu outside1 1500
mtu outside2 1500
mtu inside 1500
mtu management 1500
ip local pool TS_VPN_ADD_POOL 192.168.118.100-192.168.118.149 mask 255.255.255.0
asdm image disk0:/asdm-507.bin
asdm location GXS_Server 255.255.255.255 outside2
asdm location ISA_Server 255.255.255.255 inside
asdm location 172.16.16.0 255.255.255.0 outside2
asdm location 192.168.118.0 255.255.255.0 outside2
no asdm history enable
arp timeout 14400
nat-control
global (outside2) 10 interface
nat (outside2) 10 0.0.0.0 0.0.0.0
nat (inside) 0 access-list inside_nat0_outbound
nat (inside) 10 172.16.16.0 255.255.255.0
static (inside,outside2) tcp interface www ISA_Server www netmask 255.255.255.255 
static (inside,outside2) tcp interface smtp ISA_Server smtp netmask 255.255.255.255 
static (inside,outside2) tcp interface https ISA_Server https netmask 255.255.255.255 
access-group outside2_access_in in interface outside2
access-group inside_access_in in interface inside
route outside2 0.0.0.0 0.0.0.0 X.X.X.X 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
timeout mgcp-pat 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
group-policy TS_VPN_GRP internal
group-policy TS_VPN_GRP attributes
 dns-server value 172.16.16.10
 default-domain value domain.com
 webvpn
username T-User password XXXX encrypted privilege 0
username T-User attributes
 vpn-group-policy TS_VPN_GRP
 webvpn
http server enable
http 10.10.10.0 255.255.255.248 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac 
crypto dynamic-map outside2_dyn_map 20 set transform-set ESP-3DES-SHA
crypto map outside2_map 65535 ipsec-isakmp dynamic outside2_dyn_map
crypto map outside2_map interface outside2
isakmp enable outside2
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption 3des
isakmp policy 10 hash sha
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
tunnel-group TS_VPN_GRP type ipsec-ra
tunnel-group TS_VPN_GRP general-attributes
 address-pool TS_VPN_ADD_POOL
 default-group-policy TS_VPN_GRP
tunnel-group TS_VPN_GRP ipsec-attributes
 pre-shared-key Terminal-User-951
telnet timeout 5
ssh timeout 5
console timeout 5
dhcpd address 172.16.16.20-172.16.16.99 inside
dhcpd dns 172.16.16.10 
dhcpd lease 3600
dhcpd ping_timeout 50
dhcpd domain domain.com
dhcpd option 3 ip 172.16.16.2
dhcpd enable inside
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map global_policy
 class inspection_default
  inspect dns maximum-length 512 
  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
smtp-server 192.168.18.1
Cryptochecksum:d5000242a22ff2b8b6447648822c6361
: end
 
 
---------- Config. 2 -------------------------------------
 
: Saved
: Written by enable_15 at 15:35:18.170 EST Tue Jul 1 2008
!
ASA Version 7.0(7) 
!
hostname SYDASA01
domain-name domain.com
enable password XXXX encrypted
names
name X.X.X.X GXS_Server description GXS VPN Server
name 172.16.16.1 ISA_Server description Internal ISA Server
dns-guard
!
interface Ethernet0/0
 description UNUSED Connection
 shutdown
 nameif outside1
 security-level 0
 ip address X.X.X.X 255.255.255.252 
!
interface Ethernet0/1
 description Internet Connection
 nameif outside2
 security-level 0
 ip address X.X.X.X 255.255.255.252 
!
interface Ethernet0/2
 description Internal (DMZ Network)
 nameif inside
 security-level 100
 ip address 172.16.16.2 255.255.255.0 
!
interface Management0/0
 description Management Port Only
 nameif management
 security-level 0
 ip address 10.10.10.1 255.255.255.248 
 management-only
!
passwd XXXX encrypted
ftp mode passive
clock timezone EST 10
clock summer-time EDT recurring last Sun Oct 2:00 last Sun Mar 3:00
object-group service WebAccess tcp
 description HTTP/HTTPS access
 port-object eq www
 port-object eq https
object-group service DNS tcp-udp
 description DNS Group
 port-object range domain domain
object-group service GXS_TCP tcp
 description Group for GXS TCP Protocols
 port-object range 264 264
object-group service GXS_UDP udp
 description Group for GXS UDP Protocols
 port-object range 2746 2746
 port-object range isakmp isakmp
access-list outside2_access_in remark Allow Inbound HTTP Access to ISA Server only
access-list outside2_access_in extended permit tcp any interface outside2 eq www 
access-list outside2_access_in remark Allow Inbound SMTP (TCP 25) Access to ISA Server only.
access-list outside2_access_in extended permit tcp any eq smtp interface outside2 eq smtp 
access-list outside2_access_in remark Allow Inbound HTTPS (TCP 443) Access to ISA Server only.
access-list outside2_access_in extended permit tcp any interface outside2 eq https 
access-list inside_access_in remark Allow SMTP Outbound (TCP 25) from ISA Server only.
access-list inside_access_in extended permit tcp host ISA_Server any eq smtp 
access-list inside_access_in remark Allow DNS Outbound (UDP 53) from DNS Server only.
access-list inside_access_in extended permit udp host 192.168.18.1 any eq domain 
access-list inside_access_in remark Allow DNS Outbound (UDP 53) from WIN2K3 Server only.
access-list inside_access_in extended permit udp host 172.16.16.10 any eq domain 
access-list inside_access_in remark Allow Web Access Outbound (HTTP/HTTPS) from perimeter network only.
access-list inside_access_in extended permit tcp 172.16.16.0 255.255.255.0 any object-group WebAccess 
access-list inside_access_in remark Allow Outbound FTP (TCP 23) from ISA Server only.
access-list inside_access_in extended permit tcp host ISA_Server any eq ftp 
access-list inside_access_in remark Allow NTP Outbound (UDP 123) from ISA Server only.
access-list inside_access_in extended permit udp host ISA_Server any eq ntp 
access-list inside_access_in remark Allow Outbound GXS VPN Connection TCP Rule (TCP 264) from ISA Server only.
access-list inside_access_in extended permit tcp host ISA_Server host GXS_Server object-group GXS_TCP 
access-list inside_access_in remark Allow Outbound GXS VPN Connection UDP Rule (UDP 500/2746) from ISA Server only.
access-list inside_access_in extended permit udp host ISA_Server host GXS_Server object-group GXS_UDP 
access-list inside_access_in extended permit ip 192.168.18.0 255.255.255.0 192.168.118.0 255.255.255.0 
access-list inside_access_in extended permit ip 172.16.16.0 255.255.255.0 192.168.118.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip any 172.16.16.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip 172.16.16.0 255.255.255.0 192.168.118.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip 192.168.18.0 255.255.255.0 192.168.118.0 255.255.255.0 
access-list inside_nat0_outbound extended permit ip 192.168.118.0 255.255.255.0 192.168.118.0 255.255.255.0 
pager lines 24
logging enable
logging timestamp
logging asdm informational
logging from-address sydasa01@domain.com
logging recipient-address administrator@domain.com level errors
logging device-id hostname
logging host inside 192.168.18.67
mtu outside1 1500
mtu outside2 1500
mtu inside 1500
mtu management 1500
ip local pool TS_VPN_ADD_POOL 192.168.118.100-192.168.118.149 mask 255.255.255.0
asdm image disk0:/asdm-507.bin
asdm location GXS_Server 255.255.255.255 outside2
asdm location ISA_Server 255.255.255.255 inside
asdm location 172.16.16.0 255.255.255.0 outside2
asdm location 192.168.118.0 255.255.255.0 outside2
no asdm history enable
arp timeout 14400
nat-control
global (outside2) 10 interface
nat (outside2) 10 0.0.0.0 0.0.0.0
nat (inside) 0 access-list inside_nat0_outbound
nat (inside) 10 172.16.16.0 255.255.255.0
nat (inside) 10 192.168.18.0 255.255.255.0
static (inside,outside2) tcp interface www ISA_Server www netmask 255.255.255.255 
static (inside,outside2) tcp interface smtp ISA_Server smtp netmask 255.255.255.255 
static (inside,outside2) tcp interface https ISA_Server https netmask 255.255.255.255 
access-group outside2_access_in in interface outside2
access-group inside_access_in in interface inside
route outside2 0.0.0.0 0.0.0.0 X.X.X.X 1
route inside 0.0.0.0 0.0.0.0 172.16.16.1 tunneled
route inside 192.168.18.0 255.255.255.0 ISA_Server 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
timeout mgcp-pat 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
group-policy TS_VPN_GRP internal
group-policy TS_VPN_GRP attributes
 dns-server value 192.168.18.1
 default-domain value domain.com
 webvpn
username T-User password XXXXX encrypted privilege 0
username T-User attributes
 vpn-group-policy TS_VPN_GRP
 webvpn
http server enable
http 10.10.10.0 255.255.255.248 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac 
crypto dynamic-map outside2_dyn_map 20 set transform-set ESP-3DES-SHA
crypto map outside2_map 65535 ipsec-isakmp dynamic outside2_dyn_map
crypto map outside2_map interface outside2
isakmp enable outside2
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption 3des
isakmp policy 10 hash sha
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
tunnel-group TS_VPN_GRP type ipsec-ra
tunnel-group TS_VPN_GRP general-attributes
 address-pool TS_VPN_ADD_POOL
 default-group-policy TS_VPN_GRP
tunnel-group TS_VPN_GRP ipsec-attributes
 pre-shared-key Terminal-User-951
telnet timeout 5
ssh timeout 5
console timeout 5
dhcpd address 172.16.16.20-172.16.16.99 inside
dhcpd dns 172.16.16.10 
dhcpd lease 3600
dhcpd ping_timeout 50
dhcpd domain domain.com
dhcpd option 3 ip 172.16.16.2
dhcpd enable inside
!
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map global_policy
 class inspection_default
  inspect dns maximum-length 512 
  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
smtp-server 192.168.18.1
Cryptochecksum:c8604d70e8a23e3cf7be74222c6ce6c1
: end
Attachments:
 
Testing-Network.gif (52 KB) (File Type Details) 
Testing Network
Testing Network
 
[+][-]07/02/08 05:59 PM, ID: 21922000Expert Comment

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[+][-]07/08/08 11:14 PM, ID: 21960956Author Comment

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[+][-]07/16/08 08:58 PM, ID: 22022281Accepted Solution

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Zones: MS Forefront-ISA, Networking Hardware Firewalls, Cisco PIX Firewall
Tags: Cisco, ASA, 5510
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Solution Provided By: cheeky-monkey
Participating Experts: 1
Solution Grade: A
 
[+][-]07/23/08 01:52 AM, ID: 22067187Author Comment

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