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2196
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5
Helpful
8
Replies

Need site to site VPN to route subnet through alternate gateway.

azwatkins
Level 1
Level 1

‎09-24-2012 05:03 PM

Is it possible to route a specific subnet through a site-to-site vpn?  Example:

Remote office Cisco ASA 5505:  192.168.2.0\24

Corp office Cisco ASA 5510:  192.168.1.0\24

Datacenter 172.17.24.0\24

I need to be able to route all traffic to 172.17.24.0\24 through the Corp VPN and back to the remote site.

                   

ASA Version 8.2(1)

!

hostname Remote1

domain-name Domain

names

name 192.168.1.0 Corp

!

interface Vlan1

nameif inside

security-level 100

ip address 192.168.2.2 255.255.255.0

!

interface Vlan2

nameif outside

security-level 0

ip address 216.xxx.xxx.xxx255.255.255.248

!

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 Domain

access-list inside_access_in extended permit ip any any

access-list outside_1_cryptomap extended permit ip 192.168.2.0 255.255.255.0 Corp 255.255.255.0

access-list inside_nat0_outbound extended permit ip 192.168.2.0 255.255.255.0 Corp 255.255.255.0

access-list outside_nat0_outbound extended permit ip Corp 255.255.255.0 192.168.2.0 255.255.255.0

pager lines 24

logging asdm informational

mtu inside 1500

mtu outside 1500

no failover

icmp unreachable rate-limit 1 burst-size 1

icmp permit any inside

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

nat (outside) 0 access-list outside_nat0_outbound

access-group inside_access_in in interface inside control-plane

route outside 0.0.0.0 0.0.0.0 216.xxx.xxx.xxx 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

aaa authentication ssh console LOCAL

http server enable

http 0.0.0.0 0.0.0.0 inside

http 0.0.0.0 0.0.0.0 outside

http 192.168.2.0 255.255.255.0 inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac

crypto ipsec security-association lifetime seconds 28800

crypto ipsec security-association lifetime kilobytes 4608000

crypto map outside_map 1 match address outside_1_cryptomap

crypto map outside_map 1 set peer 184.xxx.xxx.xxx

crypto map outside_map 1 set transform-set ESP-3DES-SHA

crypto map outside_map interface outside

crypto isakmp enable inside

crypto isakmp enable outside

crypto isakmp policy 5

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

crypto isakmp policy 10

authentication pre-share

encryption des

hash sha

group 2

lifetime 86400

telnet timeout 5

ssh 0.0.0.0 0.0.0.0 inside

ssh 192.168.2.0 255.255.255.0 inside

ssh 0.0.0.0 0.0.0.0 outside

ssh timeout 5

console timeout 0

management-access inside

dhcpd auto_config outside

!

dhcpd address 192.168.2.20-192.168.2.200 inside

dhcpd dns 192.168.1.247 216.xxx.xxx.xxx interface inside

dhcpd lease 69100 interface inside

dhcpd domain Domain interface inside

dhcpd enable inside

!

threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept

webvpn

tunnel-group 184.xxx.xxx.xxxtype ipsec-l2l

tunnel-group 184.xxx.xxx.xxxipsec-attributes

pre-shared-key *

!

!

prompt hostname context

: end

Thank you for any help.

ASA Version 8.2(1)

!

hostname Remote1

domain-name Domain

names

name 192.168.1.0 Corp

!

interface Vlan1

nameif inside

security-level 100

ip address 192.168.2.2 255.255.255.0

!

interface Vlan2

nameif outside

security-level 0

ip address 216.xxx.xxx.xxx255.255.255.248

!

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 Domain

access-list inside_access_in extended permit ip any any

access-list outside_1_cryptomap extended permit ip 192.168.2.0 255.255.255.0 Corp 255.255.255.0

access-list inside_nat0_outbound extended permit ip 192.168.2.0 255.255.255.0 Corp 255.255.255.0

access-list outside_nat0_outbound extended permit ip Corp 255.255.255.0 192.168.2.0 255.255.255.0

pager lines 24

logging asdm informational

mtu inside 1500

mtu outside 1500

no failover

icmp unreachable rate-limit 1 burst-size 1

icmp permit any inside

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

nat (outside) 0 access-list outside_nat0_outbound

access-group inside_access_in in interface inside control-plane

route outside 0.0.0.0 0.0.0.0 216.xxx.xxx.xxx 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

aaa authentication ssh console LOCAL

http server enable

http 0.0.0.0 0.0.0.0 inside

http 0.0.0.0 0.0.0.0 outside

http 192.168.2.0 255.255.255.0 inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac

crypto ipsec security-association lifetime seconds 28800

crypto ipsec security-association lifetime kilobytes 4608000

crypto map outside_map 1 match address outside_1_cryptomap

crypto map outside_map 1 set peer 184.xxx.xxx.xxx

crypto map outside_map 1 set transform-set ESP-3DES-SHA

crypto map outside_map interface outside

crypto isakmp enable inside

crypto isakmp enable outside

crypto isakmp policy 5

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

crypto isakmp policy 10

authentication pre-share

encryption des

hash sha

group 2

lifetime 86400

telnet timeout 5

ssh 0.0.0.0 0.0.0.0 inside

ssh 192.168.2.0 255.255.255.0 inside

ssh 0.0.0.0 0.0.0.0 outside

ssh timeout 5

console timeout 0

management-access inside

dhcpd auto_config outside

!

dhcpd address 192.168.2.20-192.168.2.200 inside

dhcpd dns 192.168.1.247 216.xxx.xxx.xxx interface inside

dhcpd lease 69100 interface inside

dhcpd domain Domain interface inside

dhcpd enable inside

!

threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept

webvpn

tunnel-group 184.xxx.xxx.xxxtype ipsec-l2l

tunnel-group 184.xxx.xxx.xxxipsec-attributes

pre-shared-key *

!

!

prompt hostname context

: end

Labels:
0 Helpful
8 Replies 8

Javier Portuguez
Level 9
Level 9

‎09-24-2012 06:34 PM

Hi,

May I know where the Datacenter is (behind which FW)?

Please clarify since I cannot find it in the configuration above.

Thanks.

Portu

Sent from Cisco Technical Support Android App

0 Helpful

azwatkins
Level 1
Level 1
In response to Javier Portuguez

‎09-24-2012 07:32 PM

Sorry.  It is attached to the Corp site through a site-to-site vpn, but unavailable to the remote site directly by site-to-site vpn.

0 Helpful

Javier Portuguez
Level 9
Level 9
In response to azwatkins

‎09-24-2012 09:51 PM

Hi Alex,

Thanks for the update.

Relevant configuration Remote office Cisco ASA 5505:  192.168.2.0\24:

name 192.168.1.0 Corp

!

access-list outside_1_cryptomap extended permit ip 192.168.2.0 255.255.255.0 Corp 255.255.255.0

access-list inside_nat0_outbound extended permit ip 192.168.2.0 255.255.255.0 Corp 255.255.255.0

!

nat (inside) 0 access-list inside_nat0_outbound

!

crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac

!

crypto map outside_map 1 match address outside_1_cryptomap

crypto map outside_map 1 set peer 184.xxx.xxx.xxx

crypto map outside_map 1 set transform-set ESP-3DES-SHA

crypto map outside_map interface outside

!

crypto isakmp enable outside

!

crypto isakmp policy 5

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

!

crypto isakmp policy 10

authentication pre-share

encryption des

hash sha

group 2

lifetime 86400

!

tunnel-group 184.xxx.xxx.xxxtype ipsec-l2l

tunnel-group 184.xxx.xxx.xxxipsec-attributes

pre-shared-key *

!

route outside 0.0.0.0 0.0.0.0 216.xxx.xxx.xxx 1

*****

It looks good to me, please share the configuration of the Corp site?

Thanks.

Portu

Please rate any helpful posts.

Message was edited by: Javier Portuguez

0 Helpful

azwatkins
Level 1
Level 1
In response to Javier Portuguez

‎09-25-2012 09:26 AM

ASA Version 8.2(1)
!
hostname Corp
domain-name Domain
names
name 172.xxx.xxx.0 Datacenter
name 184.xxx.xxx.32 Datacenter_colo
name 192.168.2.0 Remote1
!
interface Ethernet0/0
nameif outside
security-level 0
ip address 184.xxx.xxx.34 255.255.255.240
!
interface Ethernet0/1
nameif inside
security-level 100
ip address 192.168.1.2 255.255.255.0
!
interface Ethernet0/2
no nameif
no security-level
no ip address
!
interface Ethernet0/3
no nameif
no security-level
no ip address
!
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.1 255.255.255.0
management-only
!
ftp mode passive
clock timezone MST -7
dns domain-lookup outside
dns domain-lookup inside
dns domain-lookup management
dns server-group DefaultDNS
name-server srv01
domain-name Domain
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
access-list 23 standard permit any
access-list outside_1_cryptomap extended permit ip 192.168.1.0 255.255.255.0 Datacenter 255.255.255.0
access-list inside_nat0_outbound extended permit ip 192.168.1.0 255.255.255.0 Remote1 255.255.255.0
access-list inside_nat0_outbound extended permit ip 192.168.1.0 255.255.255.0 Datacenter 255.255.255.0
access-list outside_2_cryptomap extended permit ip 192.168.1.0 255.255.255.0 Datacenter 255.255.255.0
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 2019
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 3389
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 2016
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 range 4005 4009
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 4218
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq https
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 8443
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 4056
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq citrix-ica
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq 2027
access-list outside_access_in extended permit tcp any 184.xxx.xxx.32 255.255.255.240 eq www
access-list outside_access_in extended permit ip Datacenter_colo 255.255.255.224 any
access-list outside_4_cryptomap extended permit ip 192.168.1.0 255.255.255.0 Remote1 255.255.255.0
pager lines 24
logging enable
logging asdm warnings
mtu outside 1500
mtu inside 1500
mtu management 1500
icmp unreachable rate-limit 1 burst-size 1
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 3389 srv01 3389 netmask 255.255.255.255
static (inside,outside) tcp interface citrix-ica srv01 citrix-ica netmask 255.255.255.255
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 184.xxx.xxx.33 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
aaa-server Domain_Server protocol nt
aaa-server Domain_Server (inside) host srv01
nt-auth-domain-controller 192.168.1.247
aaa authentication ssh console LOCAL
aaa authentication telnet console LOCAL
aaa authentication enable console LOCAL
http server enable
http server idle-timeout 5
http server session-timeout 10
http 0.0.0.0 0.0.0.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
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-AES-256-SHA esp-aes-256 esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac
crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac
crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5
crypto map outside_map 1 match address outside_1_cryptomap
crypto map outside_map 1 set pfs group1
crypto map outside_map 1 set peer 184.xxx.xxx.34
crypto map outside_map 1 set transform-set ESP-3DES-MD5
crypto map outside_map 2 match address outside_2_cryptomap_1
crypto map outside_map 2 set pfs
crypto map outside_map 2 set peer 216.xxx.xxx.106
crypto map outside_map 2 set transform-set ESP-3DES-SHA
crypto map outside_map 3 match address outside_3_cryptomap
crypto map outside_map 3 set peer 184.xxx.xxx.101
crypto map outside_map 3 set transform-set ESP-3DES-SHA
crypto map outside_map 4 match address outside_4_cryptomap
crypto map outside_map 4 set peer 216.xxx.xxx.90
crypto map outside_map 4 set transform-set ESP-3DES-SHA
crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 5
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp policy 10
authentication pre-share
encryption des
hash sha
group 2
lifetime 86400
crypto isakmp policy 30
authentication pre-share
encryption 3des
hash md5
group 2
lifetime 86400
crypto isakmp policy 50
authentication pre-share
encryption 3des
hash md5
group 1
lifetime 86400
crypto isakmp policy 70
authentication pre-share
encryption 3des
hash sha
group 1
lifetime 86400
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 inside
ssh 0.0.0.0 0.0.0.0 management
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ssl server-version sslv3
ssl client-version sslv3-only
ssl encryption rc4-sha1 aes128-sha1 aes256-sha1 des-sha1
webvpn
enable outside
svc image disk0:/anyconnect-win-2.4.1012-k9.pkg 1 regex "Windows NT"
svc enable
group-policy DfltGrpPolicy attributes
vpn-tunnel-protocol IPSec l2tp-ipsec svc webvpn
service-type remote-access
webvpn
  url-list value Citrix_MB
webvpn
  url-list value Citrix_MB
tunnel-group 184.xxx.xxx.34 type ipsec-l2l
tunnel-group 184.xxx.xxx.34 ipsec-attributes
pre-shared-key *
tunnel-group 216.xxx.xxx.106 type ipsec-l2l
tunnel-group 216.xxx.xxx.106 ipsec-attributes
pre-shared-key *
tunnel-group 184.xxx.xxx.101 type ipsec-l2l
tunnel-group 184.xxx.xxx.101 ipsec-attributes
pre-shared-key *
tunnel-group 216.xxx.xxx.90 type ipsec-l2l
tunnel-group 216.xxx.xxx.90 ipsec-attributes
pre-shared-key *
tunnel-group NT_VPN type remote-access
tunnel-group NT_VPN general-attributes
authentication-server-group Domain_Server
dhcp-server srv01
tunnel-group NT_VPN webvpn-attributes
group-alias DOMAINVPN enable
!
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
: end

0 Helpful

Javier Portuguez
Level 9
Level 9
In response to azwatkins

‎09-25-2012 10:58 AM

Dear Alex,

Relevant configuration:

access-list inside_nat0_outbound extended permit ip 192.168.1.0 255.255.255.0 172.17.24.0 255.255.255.0

!

access-list outside_2_cryptomap extended permit ip 192.168.1.0 255.255.255.0 172.17.24.0 255.255.255.0

!

crypto map outside_map 2 match address outside_2_cryptomap_1

crypto map outside_map 2 set pfs

crypto map outside_map 2 set peer 216.xxx.xxx.106

crypto map outside_map 2 set transform-set ESP-3DES-SHA

!

crypto isakmp policy 5

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

!

crypto map outside_map interface outside

crypto isakmp enable outside

!

tunnel-group 216.xxx.xxx.106 type ipsec-l2l

tunnel-group 216.xxx.xxx.106 ipsec-attributes

pre-shared-key *

*******************

0 Helpful

Javier Portuguez
Level 9
Level 9
In response to Javier Portuguez

‎09-25-2012 11:01 AM

Recommended actions:

On Corp:

no crypto map outside_map 2 set pfs

On both:

Make sure the pre-shared-key is corect.

Troubleshooting steps:

Remote1

1- debug crypto isakmp 190

2- debug crypto ipsec 190

Let me know.

Portu.

Please rate any helpful posts.

0 Helpful

azwatkins
Level 1
Level 1
In response to Javier Portuguez

‎09-25-2012 01:09 PM

First off Javier thank you for your help.

Recommended actions:

On Corp:

no crypto map outside_map 2 set pfs  (If I disable this then the connection between Corp and Datacenter goes down.)

On both:

Make sure the pre-shared-key is corect.  (This works since I am able to connect to either site from the other)

I am not sure I made myself clear.

Currently the site-to-site VPN is working between the Remote1 and Corp.  Also the site-to-site from Corp to the Datacenter is working correctly.  If I set DNS for Remote1 to the internal DNS at Corp I am unable to reach the server at the Datacenter by their internal IP's (172.17.24.0).  Since we have some servers at Corp and Datacenter I would like to be able to use the internal DNS.

0 Helpful

Javier Portuguez
Level 9
Level 9
In response to azwatkins

‎09-25-2012 10:50 PM

Alex,

It is interesting, cause the configurations do not reflect PFS on both sites.

Now, can you ping by IP address from remote to the DNS server?

Packet-capture on remote host (behind Remote1), do you see the DNS answer?

Thanks.

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