Solved: L2L Tunnel Up, No Traffic passes

WStoffel1 · ‎02-05-2013

Two 5505 ASA's for a customer main site and a local office. I have the tunnel up. But I'm unable to pass traffic across it. I thought I had it but turns out I was wrong so I'm going to let the pros have at it. Thank you!

Main Site:

ASA Version 7.2(4)

!

hostname Town

enable password iNbSyJZ1ffmb9kn1 encrypted

passwd 2KFQnbNIdI.2KYOU encrypted

names

!

interface Vlan1

nameif inside

security-level 100

ip address 192.168.100.254 255.255.255.0

!

interface Vlan2

nameif outside

security-level 0

ip address 24.x.x.97 255.255.255.248

!

interface Vlan3

no forward interface Vlan1

nameif dmz

security-level 50

no ip address

!

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

clock timezone EST -5

clock summer-time EDT recurring

dns server-group DefaultDNS

access-list outside_in extended permit tcp any host 24.x.x.98 eq 3389

access-list outside_in extended permit udp any host 24.x.x.98 eq 1194

access-list outside_in extended permit tcp any host 24.x.x.98 eq www

access-list vpn extended permit ip 192.168.100.0 255.255.255.0 192.168.199.0 255.255.255.0

access-list vpn extended permit ip 192.168.100.0 255.255.255.0 192.168.1.0 255.255.255.0

access-list outside_1_cryptomap extended permit ip 192.168.100.0 255.255.255.0 192.168.1.0 255.255.255.0

pager lines 24

logging enable

logging timestamp

logging buffer-size 100000

logging console debugging

logging buffered debugging

logging asdm informational

mtu inside 1500

mtu outside 1500

mtu dmz 1500

ip local pool vpnpool 192.168.199.10-192.168.199.20

icmp unreachable rate-limit 1 burst-size 1

asdm image disk0:/asdm-524.bin

no asdm history enable

arp timeout 14400

global (outside) 1 interface

nat (inside) 0 access-list vpn

nat (inside) 1 192.168.100.0 255.255.255.0

static (inside,outside) 24.x.x.98 192.168.100.3 netmask 255.255.255.255

access-group outside_in in interface outside

route outside 0.0.0.0 0.0.0.0 24.x.x.102 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

aaa authentication enable console LOCAL

aaa authentication http console LOCAL

aaa authentication ssh console LOCAL

http server enable

http 192.168.100.0 255.255.255.0 inside

http 192.168.100.50 255.255.255.255 inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

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

crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac

crypto map outside_map 1 match address outside_1_cryptomap

crypto map outside_map 1 set pfs

crypto map outside_map 1 set peer 24.x.x.54

crypto map outside_map 1 set transform-set ESP-3DES-MD5

crypto map outside_map interface outside

crypto isakmp enable outside

crypto isakmp policy 10

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

crypto isakmp policy 20

authentication pre-share

encryption 3des

hash md5

group 2

lifetime 86400

crypto isakmp policy 30

authentication pre-share

encryption 3des

hash md5

group 1

lifetime 86400

telnet 0.0.0.0 0.0.0.0 inside

telnet timeout 5

ssh 0.0.0.0 0.0.0.0 inside

ssh 0.0.0.0 0.0.0.0 outside

ssh timeout 60

console timeout 0

group-policy DfltGrpPolicy attributes

banner none

wins-server none

dns-server none

dhcp-network-scope none

vpn-access-hours none

vpn-simultaneous-logins 3

vpn-idle-timeout 30

vpn-session-timeout none

vpn-filter none

vpn-tunnel-protocol IPSec l2tp-ipsec webvpn

password-storage disable

ip-comp disable

re-xauth disable

group-lock none

pfs enable

ipsec-udp disable

ipsec-udp-port 10000

split-tunnel-policy tunnelall

split-tunnel-network-list none

default-domain none

split-dns none

intercept-dhcp 255.255.255.255 disable

secure-unit-authentication disable

user-authentication disable

user-authentication-idle-timeout 30

ip-phone-bypass disable

leap-bypass disable

nem disable

backup-servers keep-client-config

msie-proxy server none

msie-proxy method no-modify

msie-proxy except-list none

msie-proxy local-bypass disable

nac disable

nac-sq-period 300

nac-reval-period 36000

nac-default-acl none

address-pools none

smartcard-removal-disconnect enable

client-firewall none

client-access-rule none

webvpn

functions url-entry

html-content-filter none

homepage none

keep-alive-ignore 4

http-comp gzip

filter none

url-list none

customization value DfltCustomization

port-forward none

port-forward-name value Application Access

sso-server none

deny-message value Login was successful, but because certain criteria have not been met or due to some specific group policy, you do not have permission to use any of the VPN features. Contact your IT administrator for more information

svc none

svc keep-installer installed

svc keepalive none

svc rekey time none

svc rekey method none

svc dpd-interval client none

svc dpd-interval gateway none

svc compression deflate

tunnel-group 24.x.x.54 type ipsec-l2l

tunnel-group 24.x.x.54 ipsec-attributes

pre-shared-key *

!

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 netbios

inspect rsh

inspect rtsp

inspect skinny

inspect esmtp

inspect sqlnet

inspect sunrpc

inspect tftp

inspect sip

inspect xdmcp

!

service-policy global_policy global

prompt hostname context

Cryptochecksum:5180fc35fcb77dbf007b34bc2159c21b

: end

Town# sh crypto isa sa

Active SA: 1

Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)

Total IKE SA: 1

1 IKE Peer: 24.x.x.54

Type : L2L Role : initiator

Rekey : no State : MM_ACTIVE

Town# sh crypto ipsec sa

interface: outside

Crypto map tag: outside_map, seq num: 1, local addr: 24.x.x.97

access-list outside_1_cryptomap permit ip 192.168.100.0 255.255.255.0 192.168.1.0 255.255.255.0

local ident (addr/mask/prot/port): (192.168.100.0/255.255.255.0/0/0)

remote ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)

current_peer: 24.x.x.54

#pkts encaps: 56, #pkts encrypt: 56, #pkts digest: 56

#pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0

#pkts compressed: 0, #pkts decompressed: 0

#pkts not compressed: 56, #pkts comp failed: 0, #pkts decomp failed: 0

#pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0

#PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0

#send errors: 0, #recv errors: 0

local crypto endpt.: 24.x.x.97, remote crypto endpt.: 24.x.x.54

path mtu 1500, ipsec overhead 58, media mtu 1500

current outbound spi: 16409623

inbound esp sas:

spi: 0xFC3F0652 (4231988818)

transform: esp-3des esp-md5-hmac none

in use settings ={L2L, Tunnel, PFS Group 2, }

slot: 0, conn_id: 21, crypto-map: outside_map

sa timing: remaining key lifetime (kB/sec): (4275000/28514)

IV size: 8 bytes

replay detection support: Y

outbound esp sas:

spi: 0x16409623 (373331491)

transform: esp-3des esp-md5-hmac none

in use settings ={L2L, Tunnel, PFS Group 2, }

slot: 0, conn_id: 21, crypto-map: outside_map

sa timing: remaining key lifetime (kB/sec): (4274996/28514)

IV size: 8 bytes

replay detection support: Y

Remote Office:

ASA Version 8.2(5)

!

hostname water

enable password rAAeK7vz0gtMeIgU encrypted

passwd 2KFQnbNIdI.2KYOU encrypted

names

name 192.168.100.0 Town description Town LAN

dns-guard

!

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

!

interface Vlan1

nameif inside

security-level 100

ip address 192.168.1.2 255.255.255.0

!

interface Vlan2

nameif outside

security-level 0

ip address 24.x.x.54 255.255.255.248

!

ftp mode passive

clock timezone EST -5

clock summer-time EDT recurring

dns server-group DefaultDNS

access-list outside_1_cryptomap extended permit ip 192.168.1.0 255.255.255.0 Town 255.255.255.0

access-list inside_nat0_outbound extended permit ip 192.168.1.0 255.255.255.0 Town 255.255.255.0

pager lines 24

logging enable

logging timestamp

logging buffer-size 32768

logging asdm-buffer-size 512

logging monitor notifications

logging buffered debugging

logging trap notifications

logging asdm notifications

mtu inside 1500

mtu outside 1500

ip local pool water 192.168.1.15-192.168.1.20 mask 255.255.255.0

icmp unreachable rate-limit 1 burst-size 1

no asdm history enable

arp timeout 14400

nat (inside) 0 access-list inside_nat0_outbound

route outside 0.0.0.0 0.0.0.0 24.x.x.49 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

timeout floating-conn 0:00:00

dynamic-access-policy-record DfltAccessPolicy

aaa authentication telnet console LOCAL

aaa authentication ssh console LOCAL

aaa authentication enable console LOCAL

http server enable

http 192.168.1.0 255.255.255.0 inside

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

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

crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac

crypto ipsec security-association lifetime seconds 28800

crypto ipsec security-association lifetime kilobytes 4608000

crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set pfs

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

crypto map outside_map 1 set peer 24.x.x.97

crypto map outside_map 1 set transform-set ESP-3DES-MD5

crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP

crypto map outside_map interface outside

crypto ca trustpoint _SmartCallHome_ServerCA

crl configure

crypto ca certificate chain _SmartCallHome_ServerCA

certificate ca 6ecc7aa5a7032009b8cebcf4e952d491

308205ec 308204d4 a0030201 0202106e cc7aa5a7 032009b8 cebcf4e9 52d49130

0d06092a 864886f7 0d010105 05003081 ca310b30 09060355 04061302 55533117

30150603 55040a13 0e566572 69536967 6e2c2049 6e632e31 1f301d06 0355040b

13165665 72695369 676e2054 72757374 204e6574 776f726b 313a3038 06035504

0b133128 63292032 30303620 56657269 5369676e 2c20496e 632e202d 20466f72

20617574 686f7269 7a656420 75736520 6f6e6c79 31453043 06035504 03133c56

65726953 69676e20 436c6173 73203320 5075626c 69632050 72696d61 72792043

65727469 66696361 74696f6e 20417574 686f7269 7479202d 20473530 1e170d31

30303230 38303030 3030305a 170d3230 30323037 32333539 35395a30 81b5310b

30090603 55040613 02555331 17301506 0355040a 130e5665 72695369 676e2c20

496e632e 311f301d 06035504 0b131656 65726953 69676e20 54727573 74204e65

74776f72 6b313b30 39060355 040b1332 5465726d 73206f66 20757365 20617420

68747470 733a2f2f 7777772e 76657269 7369676e 2e636f6d 2f727061 20286329

3130312f 302d0603 55040313 26566572 69536967 6e20436c 61737320 33205365

63757265 20536572 76657220 4341202d 20473330 82012230 0d06092a 864886f7

0d010101 05000382 010f0030 82010a02 82010100 b187841f c20c45f5 bcab2597

a7ada23e 9cbaf6c1 39b88bca c2ac56c6 e5bb658e 444f4dce 6fed094a d4af4e10

9c688b2e 957b899b 13cae234 34c1f35b f3497b62 83488174 d188786c 0253f9bc

7f432657 5833833b 330a17b0 d04e9124 ad867d64 12dc744a 34a11d0a ea961d0b

15fca34b 3bce6388 d0f82d0c 948610ca b69a3dca eb379c00 48358629 5078e845

63cd1941 4ff595ec 7b98d4c4 71b350be 28b38fa0 b9539cf5 ca2c23a9 fd1406e8

18b49ae8 3c6e81fd e4cd3536 b351d369 ec12ba56 6e6f9b57 c58b14e7 0ec79ced

4a546ac9 4dc5bf11 b1ae1c67 81cb4455 33997f24 9b3f5345 7f861af3 3cfa6d7f

81f5b84a d3f58537 1cb5a6d0 09e4187b 384efa0f 02030100 01a38201 df308201

db303406 082b0601 05050701 01042830 26302406 082b0601 05050730 01861868

7474703a 2f2f6f63 73702e76 65726973 69676e2e 636f6d30 12060355 1d130101

ff040830 060101ff 02010030 70060355 1d200469 30673065 060b6086 480186f8

45010717 03305630 2806082b 06010505 07020116 1c687474 70733a2f 2f777777

2e766572 69736967 6e2e636f 6d2f6370 73302a06 082b0601 05050702 02301e1a

1c687474 70733a2f 2f777777 2e766572 69736967 6e2e636f 6d2f7270 61303406

03551d1f 042d302b 3029a027 a0258623 68747470 3a2f2f63 726c2e76 65726973

69676e2e 636f6d2f 70636133 2d67352e 63726c30 0e060355 1d0f0101 ff040403

02010630 6d06082b 06010505 07010c04 61305fa1 5da05b30 59305730 55160969

6d616765 2f676966 3021301f 30070605 2b0e0302 1a04148f e5d31a86 ac8d8e6b

c3cf806a d448182c 7b192e30 25162368 7474703a 2f2f6c6f 676f2e76 65726973

69676e2e 636f6d2f 76736c6f 676f2e67 69663028 0603551d 11042130 1fa41d30

1b311930 17060355 04031310 56657269 5369676e 4d504b49 2d322d36 301d0603

551d0e04 1604140d 445c1653 44c1827e 1d20ab25 f40163d8 be79a530 1f060355

1d230418 30168014 7fd365a7 c2ddecbb f03009f3 4339fa02 af333133 300d0609

2a864886 f70d0101 05050003 82010100 0c8324ef ddc30cd9 589cfe36 b6eb8a80

4bd1a3f7 9df3cc53 ef829ea3 a1e697c1 589d756c e01d1b4c fad1c12d 05c0ea6e

b2227055 d9203340 3307c265 83fa8f43 379bea0e 9a6c70ee f69c803b d937f47a

6decd018 7d494aca 99c71928 a2bed877 24f78526 866d8705 404167d1 273aeddc

481d22cd 0b0b8bbc f4b17bfd b499a8e9 762ae11a 2d876e74 d388dd1e 22c6df16

b62b8214 0a945cf2 50ecafce ff62370d ad65d306 4153ed02 14c8b558 28a1ace0

5becb37f 954afb03 c8ad26db e6667812 4ad99f42 fbe198e6 42839b8f 8f6724e8

6119b5dd cdb50b26 058ec36e c4c875b8 46cfe218 065ea9ae a8819a47 16de0c28

6c2527b9 deb78458 c61f381e a4c4cb66

quit

crypto isakmp enable outside

crypto isakmp policy 10

authentication pre-share

encryption 3des

hash sha

group 2

lifetime 86400

crypto isakmp policy 20

authentication pre-share

encryption 3des

hash md5

group 2

lifetime 86400

crypto isakmp policy 30

authentication pre-share

encryption 3des

hash md5

group 1

lifetime 86400

no crypto isakmp nat-traversal

telnet 192.168.1.0 255.255.255.0 inside

telnet timeout 60

ssh 192.168.1.0 255.255.255.0 inside

ssh timeout 5

console timeout 0

dhcpd auto_config outside

!

threat-detection basic-threat

threat-detection statistics access-list

no threat-detection statistics tcp-intercept

webvpn

group-policy DfltGrpPolicy attributes

group-policy water internal

group-policy water attributes

dns-server value 192.168.1.1

vpn-idle-timeout none

vpn-session-timeout none

vpn-tunnel-protocol IPSec

username clerk attributes

vpn-group-policy DfltGrpPolicy

tunnel-group water type remote-access

tunnel-group water general-attributes

address-pool water

default-group-policy water

dhcp-server 192.168.1.1

tunnel-group water ipsec-attributes

pre-shared-key *****

tunnel-group 24.x.x.97 type ipsec-l2l

tunnel-group 24.x.x.97 ipsec-attributes

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

call-home reporting anonymous

Cryptochecksum:06bda38461d2419b3e5c4904333b62e7

: end

water# sh crypto isa sa

Active SA: 1

Rekey SA: 0 (A tunnel will report 1 Active and 1 Rekey SA during rekey)

Total IKE SA: 1

1 IKE Peer: 24.x.x.97

Type : L2L Role : responder

Rekey : no State : MM_ACTIVE

water# sh crypto ipsec sa

interface: outside

Crypto map tag: outside_map, seq num: 1, local addr: 24.x.x.54

access-list outside_1_cryptomap extended permit ip 192.168.1.0 255.255.255.0 192.168.100.0 255.255.255.0

local ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)

remote ident (addr/mask/prot/port): (Town/255.255.255.0/0/0)

current_peer: 24.x.x.97

#pkts encaps: 0, #pkts encrypt: 0, #pkts digest: 0

#pkts decaps: 78, #pkts decrypt: 78, #pkts verify: 78

#pkts compressed: 0, #pkts decompressed: 0

#pkts not compressed: 0, #pkts comp failed: 0, #pkts decomp failed: 0

#pre-frag successes: 0, #pre-frag failures: 0, #fragments created: 0

#PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0

#send errors: 0, #recv errors: 0

local crypto endpt.: 24.x.x.54, remote crypto endpt.: 24.x.x.97

path mtu 1500, ipsec overhead 58, media mtu 1500

current outbound spi: FC3F0652

current inbound spi : 16409623

inbound esp sas:

spi: 0x16409623 (373331491)

transform: esp-3des esp-md5-hmac no compression

in use settings ={L2L, Tunnel, PFS Group 2, }

slot: 0, conn_id: 126976, crypto-map: outside_map

sa timing: remaining key lifetime (kB/sec): (3914995/28408)

IV size: 8 bytes

replay detection support: Y

Anti replay bitmap:

0xFFFFFFFF 0xFFFFFFFF

outbound esp sas:

spi: 0xFC3F0652 (4231988818)

transform: esp-3des esp-md5-hmac no compression

in use settings ={L2L, Tunnel, PFS Group 2, }

slot: 0, conn_id: 126976, crypto-map: outside_map

sa timing: remaining key lifetime (kB/sec): (3915000/28408)

IV size: 8 bytes

replay detection support: Y

Anti replay bitmap:

0x00000000 0x00000001

Thanks again!

Jouni Forss · ‎02-05-2013

Also,

Now that I actually think about it...

The original ICMP that you have done would go the following way

192.168.100.x send ICMP echo
Arrives on local ASA
Gets forwarded through the L2L VPN connection
Arrives on the remote ASA
ASA forwards traffic to the LAN host 192.168.1.x
LAN host forwards reply to its default gateway 192.168.1.1 (NOT ASA)
ICMP Echo traffic gets lost because of no real route for the return traffic
- Therefore you dont see any encapsulated traffic at the destination ASA, only decapsulated traffic that is coming from the host sending the ICMP echo through the L2L VPN

- Jouni

View solution in original post

Jouni Forss · ‎02-05-2013

Hi again!

You wouldnt by any chance try to determine the connectivity by using ICMP?

If yes (and even if not) please add the following configuration on both of the ASAs

policy-map global_policy

class inspection_default

inspect icmp

This will automatically allow ICMP Echo reply messages to pass the firewall. Otherwise the might get blocked by the ASA

Otherwise your configurations seem correct to me.

It seems traffic is generated from "Town" to "Water" ASA. However either the return traffic from host behind "Water" gets blocked or the host behind "Water" doesnt allow the connection

Reasons might include (that the host doesnt reply)

Wrong default gateway IP address on host (As you dont use the very typical .1 )
Software firewall
Service used for connectins isnt enabled on the host

- Jouni

WStoffel1 · ‎02-05-2013

Actually these IP's are all over the place. I just inherited this at lunch time, spent about 2 hours setting the tunnel up and expected once i saw Phase2 negotiate that I was home free.

Good catch on the ICMP, hadn't even noticed. So yes, i was pinging from both sides to test connectivity and generate traffic. I have remote access (LogMeIn) to 192.168.100.34 on the Town side. And 192.168.1.20 on the Water side.

Looking a little closer at these 2 servers now however, these networks aren't what they appear.

On the Town network, the ASA is the default gateway:

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :

IPv4 Address. . . . . . . . . . . : 192.168.100.34

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.100.254

On the Water side it's not the ASA:

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :

IPv4 Address. . . . . . . . . . . : 192.168.1.20

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.1.1

These 2 boxes should be able to ping each other but I think i may have more than a single issue.

From Town i have no route to Water:

C:\>tracert -d 192.168.1.20

Tracing route to 192.168.1.20 over a maximum of 30 hops

1 * * * Request timed out.

2 * * * Request timed out.

3 ^C

From Water I'm just being sent out the default gateway:

C:\>tracert -d 192.168.100.34

Tracing route to 192.168.100.34 over a maximum of 30 hops

1 <1 ms <1 ms <1 ms 192.168.1.1

2 34 ms 60 ms 28 ms 10.110.192.1

3 10 ms 8 ms 8 ms 24.93.8.98

4 13 ms 66 ms 9 ms 72.230.153.56

5 15 ms 18 ms 18 ms 72.230.153.245

6 * * ^C

(in other words never even hitting the ASA)

No windows firewalls are enabled, configs look correct, other than the default gateway thing

So i ran a packet tracer and got this, which made me think i had my rules incorrect.

packet-tracer input outside tcp 192.168.100.34 32000 192.168.1.20 443 det

Phase: 1

Type: FLOW-LOOKUP

Subtype:

Result: ALLOW

Config:

Additional Information:

Found no matching flow, creating a new flow

Phase: 2

Type: ROUTE-LOOKUP

Subtype: input

Result: ALLOW

Config:

Additional Information:

in 0.0.0.0 0.0.0.0 outside

Phase: 3

Type: ACCESS-LIST

Subtype:

Result: DROP

Config:

Implicit Rule

Additional Information:

Forward Flow based lookup yields rule:

in id=0x39f2000, priority=111, domain=permit, deny=true

hits=1, user_data=0x0, cs_id=0x0, flags=0x4000, protocol=0

src ip=0.0.0.0, mask=0.0.0.0, port=0

dst ip=0.0.0.0, mask=0.0.0.0, port=0, dscp=0x0

Result:

input-interface: outside

input-status: up

input-line-status: up

output-interface: outside

output-status: up

output-line-status: up

Action: drop

Drop-reason: (acl-drop) Flow is denied by configured rule

What do you think? Always a fun problem I bring to the table!

Jouni Forss · ‎02-05-2013

Hi,

It seems almost like the other location has some other Internet Router/Device to which the default gateway of the computer points to. This is further backed up by the fact that the ASA has no sort of default PAT rule for Internet traffic. Only the NAT0 rule. So it seems it has never been used for Internet traffic. There must be some other Internet router? Do you have access to it?

Is that hosts network settings configured staticly?

I guess you could try to first check the route table of the actual host computer with "route print"

You could even consider configuring a permanent static route on the host for the remote LAN network pointing towards the ASA. Obviously this isnt ideal at all but might help with the troubleshooting and after thats done it would be easier to plan how to correct the situation and make it simpler.

If you have access to the "possible" router in the network you could use it to route the traffic to the ASA when heading to the remote LAN.

Regarding the packet-tracer command. I dont really trust what its says when trying to simulate a situation when traffic is supposed to enter from the L2L VPN connection through the "outside" interface. Testing the traffic from "inside" to the L2L VPN should always though provide correct information if the traffic is forwarded to the L2L VPN.

The traceroute might be stopping on the ASA. Not 100% sure.

- Jouni

Jouni Forss · ‎02-05-2013

Also,

Now that I actually think about it...

The original ICMP that you have done would go the following way

192.168.100.x send ICMP echo
Arrives on local ASA
Gets forwarded through the L2L VPN connection
Arrives on the remote ASA
ASA forwards traffic to the LAN host 192.168.1.x
LAN host forwards reply to its default gateway 192.168.1.1 (NOT ASA)
ICMP Echo traffic gets lost because of no real route for the return traffic
- Therefore you dont see any encapsulated traffic at the destination ASA, only decapsulated traffic that is coming from the host sending the ICMP echo through the L2L VPN

- Jouni

WStoffel1 · ‎02-05-2013

You're awesome!

Townhall# packet-tracer input inside tcp 192.168.100.34 32000 192.168.1.20 443

Phase: 1

Type: ACCESS-LIST

Subtype:

Result: ALLOW

Config:

Implicit Rule

Additional Information:

MAC Access list

Phase: 2

Type: FLOW-LOOKUP

Subtype:

Result: ALLOW

Config:

Additional Information:

Found no matching flow, creating a new flow

Phase: 3

Type: ROUTE-LOOKUP

Subtype: input

Result: ALLOW

Config:

Additional Information:

in 0.0.0.0 0.0.0.0 outside

Phase: 4

Type: IP-OPTIONS

Subtype:

Result: ALLOW

Config:

Additional Information:

Phase: 5

Type: NAT-EXEMPT

Subtype:

Result: ALLOW

Config:

match ip inside 192.168.100.0 255.255.255.0 outside 192.168.1.0 255.255.255.0

NAT exempt

translate_hits = 89, untranslate_hits = 0

Additional Information:

Phase: 6

Type: NAT

Subtype:

Result: ALLOW

Config:

nat (inside) 1 192.168.100.0 255.255.255.0

match ip inside 192.168.100.0 255.255.255.0 outside any

dynamic translation to pool 1 (24.97.193.97 [Interface PAT])

translate_hits = 1152, untranslate_hits = 17

Additional Information:

Phase: 7

Type: NAT

Subtype: host-limits

Result: ALLOW

Config:

nat (inside) 1 192.168.100.0 255.255.255.0

match ip inside 192.168.100.0 255.255.255.0 inside any

dynamic translation to pool 1 (No matching global)

translate_hits = 0, untranslate_hits = 0

Additional Information:

Phase: 8

Type: VPN

Subtype: encrypt

Result: ALLOW

Config:

Additional Information:

Phase: 9

Type: VPN

Subtype: ipsec-tunnel-flow

Result: ALLOW

Config:

Additional Information:

Phase: 10

Type: IP-OPTIONS

Subtype:

Result: ALLOW

Config:

Additional Information:

Phase: 11

Type: FLOW-CREATION

Subtype:

Result: ALLOW

Config:

Additional Information:

New flow created with id 1325, packet dispatched to next module

Result:

input-interface: inside

input-status: up

input-line-status: up

output-interface: outside

output-status: up

output-line-status: up

Action: allow

I was beating myself up over the rules but it IS correct. I thought it had to be the outside interface for a tunnel when you traced the packet

And your thought on the original ICMP above, I think you're on the money. I was just starting to put that together myself....and I've been on this all afternoon! You're fast.

I'm giong to see what i can do poking around on that 192.168.1.20 box, but its remote and I don't want to lose connectivity. I'm still waiting to here back about the gateway on that subnet. Part of the hassle with my job, not usually my setup, and almost always have limited access and limited info

Thanks for your help as always.

WStoffel1 · ‎02-05-2013

Still waiting to hear back about that one gateway, but i took a gamble, and get this....removed a bogus static route on that server....then added mine to point back to the ASA for the 192.168.100.0 network and essentially everything just started working! The one server that I put the static on is the only device that needs access to the tunnel so i'm ok with just leaving it that way. Just wanted to follow up that it's all fixed. Thanks for the insights.

Jouni Forss · ‎02-05-2013

Hi,

Great that its working.

Always good to get the final information arter a problem thats been solved. Might possibly help someone else troubleshoot their problematic situation.

- Jouni