Configuración de IPSec entre el concentrador y PIX remotos con el cliente VPN y la autenticación extendida

Introducción

Este documento ilustra una configuración IPsec que incluye tanto la funcionalidad de gateway a gateway como la de usuario remoto. Con la autenticación extendida (Xauth), el dispositivo se autentica a través de una clave previamente compartida y el usuario se autentica por medio del desafío de autenticación de nombre de usuario/contraseña.

Prerequisites

Requirements

No hay requisitos específicos para este documento.

Componentes Utilizados

La información que contiene este documento se basa en las siguientes versiones de software y hardware.

• Firewall PIX versión 6.3(3)

• Cliente Cisco VPN versión 3.5

• Cisco Secure ACS para la versión 2.6 de Windows

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Convenciones

Consulte Convenciones de Consejos TécnicosCisco para obtener más información sobre las convenciones del documento.

Antecedentes

En este ejemplo, hay un túnel IPSec de gateway a gateway desde el PIX remoto al PIX de eje de conexión. Este túnel cifra el tráfico de la red 10.48.67.x detrás del PIX remoto a la red 10.48.66.x detrás del PIX hub. El PC en Internet puede formar un túnel IPsec a través del PIX hub a la red 10.48.66.x.

Para utilizar la función Xauth, primero debe configurar su servidor básico de autenticación, autorización y contabilidad (AAA). Utilice el comando crypto map client authentication para indicar al firewall PIX que utilice el desafío Xauth (RADIUS/TACACS+ nombre de usuario y contraseña) durante la Fase 1 del Intercambio de Claves de Internet (IKE) para autenticar IKE. Si el Xauth falla, la asociación de seguridad IKE no se establece. Especifique el mismo nombre de servidor AAA dentro de la instrucción de comando crypto map client authentication que se especifica en la instrucción de comando aaa-server. El usuario remoto debe ejecutar Cisco VPN Client versión 3.x. o posterior.

Nota: Cisco recomienda utilizar Cisco VPN Client 3.5.x o posterior. VPN Client 1.1 no funciona con esta configuración y está fuera del alcance de este documento.

Nota: Cisco VPN Client 3.6 y posteriores no soporta el conjunto de transformación de des/sha.

Si necesita restaurar la configuración sin Xauth, utilice el comando no crypto map client authentication. De forma predeterminada, la característica Xauth no está activada.

Nota: La tecnología de cifrado está sujeta a controles de exportación. Es su responsabilidad conocer la ley relacionada con la exportación de tecnología de cifrado. Refiérase a la página de inicio de la Oficina de Administración de Exportaciones para obtener más información. Envíe un correo electrónico a export@cisco.com si tiene alguna pregunta relacionada con el control de exportación.

Nota: En PIX Firewall versión 5.3 y posteriores, se introdujeron los puertos RADIUS configurables. Algunos servidores RADIUS utilizan puertos RADIUS diferentes a 1645/1646 (generalmente 1812/1813). En PIX 5.3 y posteriores, los puertos de autenticación y contabilización RADIUS se pueden cambiar a otros que no sean los 1645/1646 predeterminados usando estos comandos:

aaa-server radius-authport #
aaa-server radius-acctport # 

Configurar

En esta sección encontrará la información para configurar las funciones descritas en este documento.

Nota: Use la Command Lookup Tool (sólo clientes registrados) para obtener más información sobre los comandos utilizados en este documento.

Diagrama de la red

Este diagrama utiliza líneas negrita verdes y negras para indicar los túneles VPN.

Configuraciones

Este documento usa estas configuraciones.

• Hub PIX

• PIX remoto

Nota: Por ejemplo en este documento, la dirección IP del servidor VPN es 209.165.200.225, el nombre del grupo es "vpn3000" y la contraseña del grupo es cisco.

PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 auto
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password OnTrBUG1Tp0edmkr encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname hubfixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names

!--- Include traffic in the encryption process.

access-list 101 permit ip 10.48.66.0 255.255.255.0 10.48.67.0 255.255.255.0
!--- Accept traffic from the Network Address Translation (NAT) process
access-list nonat permit ip 10.48.66.0 255.255.255.0 10.48.67.0 255.255.255.0
access-list nonat permit ip 10.48.66.0 255.255.255.0 10.48.68.0 255.255.255.0
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside 209.165.200.225 255.255.255.224
ip address inside 10.48.66.18 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool mypool 10.48.68.1-10.48.68.254
no failover
failover timeout 0:00:00
failover poll 15
no failover ip address outside
no failover ip address inside
pdm history enable
arp timeout 14400
global (outside) 1 209.16.200.230-209.16.200.240 netmask 255.255.255.224
global (outside) 1 209.16.200.241

!--- Except traffic from the NAT process.

nat (inside) 0 access-list nonat
nat (inside) 1 10.48.66.0 255.255.255.0 0 0
route outside 0.0.0.0 0.0.0.0 209.165.200.226 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
aaa-server mytacacs protocol tacacs+
aaa-server mytacacs (inside) host 10.48.66.102 cisco timeout 5
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set myset esp-des esp-md5-hmac
crypto dynamic-map dynmap 10 set transform-set myset

!--- Use the crypto-map sequence 10 command for PIX to PIX.

crypto map mymap 10 ipsec-isakmp
crypto map mymap 10 match address 101
crypto map mymap 10 set peer 209.165.202.129
crypto map mymap 10 set transform-set myset

!--- Use the crypto-map sequence 20 command for PIX to VPN Client.

crypto map mymap 20 ipsec-isakmp dynamic dynmap
crypto map mymap client authentication mytacacs
crypto map mymap interface outside
isakmp enable outside
isakmp key ******** address 209.165.202.129 netmask 255.255.255.255
isakmp identity address
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption des
isakmp policy 10 hash md5

!--- ISAKMP policy for VPN Client that runs 3.x code needs to be DH group 2.

isakmp policy 10 group 2
isakmp policy 10 lifetime 86400

!--- IPsec group configuration for VPN Client.
 
vpngroup vpn3000 address-pool mypool
vpngroup vpn3000 dns-server 10.48.66.129
vpngroup vpn3000 wins-server 10.48.66.129
vpngroup vpn3000 default-domain cisco.com
vpngroup vpn3000 idle-time 1800
vpngroup vpn3000 password ********
telnet timeout 5
ssh timeout 5
console timeout 0
terminal width 80
Cryptochecksum:7293dd9fc7c58ff5d65f042dd6ddbe13
: end

PIX Version 6.3(3)
interface ethernet0 auto
interface ethernet1 100basetx
interface ethernet2 auto shutdown
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 intf2 security4
enable password OnTrBUG1Tp0edmkr encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname remote
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list 101 permit ip 10.48.67.0 255.255.255.0 10.48.66.0 255.255.255.0

!--- Accept traffic from the NAT process.

access-list nonat permit ip 10.48.67.0 255.255.255.0 10.48.66.0 255.255.255.0
pager lines 24
mtu outside 1500
mtu inside 1500
mtu intf2 1500
ip address outside 209.165.202.129 255.255.255.224
ip address inside 10.48.67.155 255.255.255.0
no ip address intf2
ip audit info action alarm
ip audit attack action alarm
no failover
failover timeout 0:00:00
failover poll 15
no failover ip address outside
no failover ip address inside
no failover ip address intf2
pdm history enable
arp timeout 14400
global (outside) 1 209.16.202.135-209.16.202.145 netmask 255.255.255.224
global (outside) 1 209.16.202.146

!--- Except traffic from the NAT process.

nat (inside) 0 access-list nonat
nat (inside) 1 10.48.0.0 255.255.255.0 0 0
nat (inside) 1 10.48.67.0 255.255.255.0 0 0
route outside 0.0.0.0 0.0.0.0 209.165.202.130 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
crypto ipsec transform-set myset esp-des esp-md5-hmac
crypto map mymap 10 ipsec-isakmp

!--- Include traffic in the encryption process.

crypto map mymap 10 match address 101
crypto map mymap 10 set peer 209.165.200.225
crypto map mymap 10 set transform-set myset
crypto map mymap interface outside
isakmp enable outside
isakmp key ******** address 209.165.200.225 netmask 255.255.255.255
isakmp identity address
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption des
isakmp policy 10 hash md5
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
telnet timeout 5
ssh timeout 5
console timeout 0
terminal width 80
Cryptochecksum:13ef4d29384c65c2cd968b5d9396f6e8
: end

Refiérase a la sección "Configuraciones" de Configuración de PIX a PIX y VPN Client 3.x para obtener información detallada sobre cómo configurar VPN Client. Además, consulte Cómo Agregar Autenticación AAA (Xauth) a PIX IPsec 5.2 y posteriores para obtener información adicional sobre la configuración de la Autenticación AAA a PIX IPsec.

Verificación

Esta sección proporciona información que puede utilizar para confirmar que su configuración funciona correctamente.

La herramienta Output Interpreter Tool (clientes registrados solamente) (OIT) soporta ciertos comandos show. Utilice la OIT para ver un análisis del resultado del comando show.

• show crypto ipsec sa — Muestra las asociaciones de seguridad de la fase 1.

• show crypto ipsec sa — Muestra las asociaciones de seguridad de la Fase 2.

Troubleshoot

En esta sección encontrará información que puede utilizar para solucionar problemas de configuración.

Comandos para resolución de problemas

La herramienta Output Interpreter Tool (clientes registrados solamente) (OIT) soporta ciertos comandos show. Utilice la OIT para ver un análisis del resultado del comando show.

Nota: Consulte Información Importante sobre Comandos Debug antes de utilizar los comandos debug.

Estas depuraciones deben ejecutarse en ambos routers IPsec (peers). Las asociaciones de seguridad deben borrarse en ambos pares.

• debug crypto ipsec — Muestra errores durante la fase 1.

• debug crypto ipsec — Muestra errores durante la fase 2.

• debug crypto engine — Muestra información del motor de criptografía.

• clear crypto isakmp sa—Borra las asociaciones de seguridad de la fase 1.

• clear crypto ipsec sa—limpia las asociaciones de seguridad de fase 2.

• debug radius [session | all | user username]—Disponible en PIX 6.2, este comando registra la información de sesión RADIUS y los atributos de los paquetes RADIUS enviados y recibidos.

• debug tacacs [session|user <user_name>]—Disponible en PIX 6.3, este comando registra información TACACS.

• debug aaa [authentication|authorization|accounting|internal]—Disponible en PIX 6.3, muestra información del subsistema AAA.

Depuraciones del Hub PIX

Nota: Tenga en cuenta que a veces cuando la negociación IPSec es exitosa, no todas las depuraciones se muestran en el PIX debido al ID de bug Cisco CSCdu84168 (sólo clientes registrados) que es un duplicado del ID de bug interno de Cisco CSCdt31745 (sólo clientes registrados). Esto todavía no se ha resuelto al momento de escribir este documento.

Nota: A veces la VPN IPSec de los clientes VPN puede no terminar en el PIX. Para resolver este problema, asegúrese de que el equipo cliente no tenga ningún firewall. Si hay firewalls, verifique si los puertos UDP 500 y 4500 están inhabilitados. Si este es el caso, habilite IPSec sobre TCP o desbloquee los puertos UDP.

Depuraciones de un túnel IPSec dinámico entre el concentrador y PIX remotos

crypto_isakmp_process_block:src:209.165.202.129, 
dest:209.165.200.225 spt:500 dpt:500
OAK_MM exchange
ISAKMP (0): processing SA payload. message ID = 0

ISAKMP (0): Checking ISAKMP transform 1 against priority 10 policy
ISAKMP:      encryption DES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      auth pre-share
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x1 0x51 0x80 
ISAKMP (0): atts are acceptable. Next payload is 0
ISAKMP (0): SA is doing pre-shared key authentication using id type ID_IPV4_ADDR
return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.165.202.129, dest:209.165.200.225 
spt:500 dpt:500
OAK_MM exchange
ISAKMP (0): processing KE payload. message ID = 0

ISAKMP (0): processing NONCE payload. message ID = 0

ISAKMP (0): processing vendor id payload

ISAKMP (0): received xauth v6 vendor id

ISAKMP (0): processing vendor id payload

ISAKMP (0): remote peer supports dead peer detection

ISAKMP (0): processing vendor id payload

ISAKMP (0): processing vendor id payload

ISAKMP (0): speaking to another IOS box!

return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.165.202.129, dest:209.165.200.225 
spt:500 dpt:500
OAK_MM exchange
ISAKMP (0): processing ID payload. message ID = 0
ISAKMP (0): processing HASH payload. message ID = 0
ISAKMP (0): SA has been authenticated

ISAKMP: Created a peer struct for 209.165.202.129, peer port 62465
ISAKMP (0): ID payload
        next-payload : 8
        type         : 1
        protocol     : 17
        port         : 500
        length       : 8
ISAKMP (0): Total payload length: 12
return status is IKMP_NO_ERROR
ISAKMP (0): sending INITIAL_CONTACT notify
ISAKMP (0): sending NOTIFY message 24578 protocol 1
VPN Peer: ISAKMP: Added new peer: ip:209.165.202.129/500 Total VPN Peers:1
VPN Peer: ISAKMP: Peer ip:209.165.202.129/500 Ref cnt incremented to:1 
Total VPN Peers:1
crypto_isakmp_process_block:src:209.165.202.129, dest:209.165.200.225 
spt:500 dpt:500
ISAKMP (0): processing NOTIFY payload 24578 protocol 1
        spi 0, message ID = 863921625
ISAKMP (0): processing notify INITIAL_CONTACTIPSEC(key_engine): 
got a queue event...
IPSEC(key_engine_delete_sas): rec'd delete notify from ISAKMP
IPSEC(key_engine_delete_sas): delete all SAs shared with 209.165.202.129

return status is IKMP_NO_ERR_NO_TRANS
crypto_isakmp_process_block:src:209.165.202.129, dest:209.165.200.225 
spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_IDLE
ISAKMP (0): processing SA payload. message ID = 2542705093

ISAKMP : Checking IPSec proposal 1

ISAKMP: transform 1, ESP_DES
ISAKMP:   attributes in transform:
ISAKMP:      encaps is 1
ISAKMP:      SA life type in seconds
ISAKMP:      SA life duration (basic) of 28800
ISAKMP:      SA life type in kilobytes
ISAKMP:      SA life duration (VPI) of  0x0 0x46 0x50 0x0 
ISAKMP:      authenticator is HMAC-MD5
ISAKMP (0): atts are acceptable.IPSEC(validate_proposal_request): proposal part #1,
  (key eng. msg.) dest= 209.165.200.225, src= 209.165.202.129, 
    dest_proxy= 10.48.66.0/255.255.255.0/0/0 (type=4), 
    src_proxy= 10.48.67.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 0s and 0kb, 
    spi= 0x0(0), conn_id= 0, keysize= 0, flags= 0x4

ISAKMP (0): processing NONCE payload. message ID = 2542705093

ISAKMP (0): processing ID payload. message ID = 2542705093
ISAKMP (0): ID_IPV4_ADDR_SUBNET src 10.48.67.0/255.255.255.0 prot 0 port 0
ISAKMP (0): processing ID payload. message ID = 2542705093
ISAKMP (0): ID_IPV4_ADDR_SUBNET dst 10.48.66.0/255.255.255.0 prot 0 port 0
IPSEC(key_engine): got a queue event...
IPSEC(spi_response): getting spi 0x858c841a(2240578586) for SA 
        from 209.165.202.129 to 209.165.200.225 for prot 3

return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:209.165.202.129, dest:209.165.200.225 
spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_AUTH_AWAIT
ISAKMP (0): Creating IPSec SAs
        inbound SA from 209.165.202.129 to 209.165.200.225 
        (proxy 10.48.67.0 to 10.48.66.0)
        has spi 2240578586 and conn_id 3 and flags 4
        lifetime of 28800 seconds
        lifetime of 4608000 kilobytes
        outbound SA from 209.165.200.225 to 209.165.202.129 
        (proxy  10.48.66.0 to 10.48.67.0)
        has spi 681010504 and conn_id 4 and flags 4
        lifetime of 28800 seconds
        lifetime of 4608000 kilobytesIPSEC(key_engine): got a queue event...
IPSEC(initialize_sas): ,
  (key eng. msg.) dest= 209.165.200.225, src= 209.165.202.129, 
    dest_proxy= 10.48.66.0/255.255.255.0/0/0 (type=4), 
    src_proxy= 10.48.67.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 28800s and 4608000kb, 
    spi= 0x858c841a(2240578586), conn_id= 3, keysize= 0, flags= 0x4
IPSEC(initialize_sas): ,
  (key eng. msg.) src= 209.165.200.225, dest= 209.165.202.129, 
    src_proxy= 10.48.66.0/255.255.255.0/0/0 (type=4), 
    dest_proxy= 10.48.67.0/255.255.255.0/0/0 (type=4),
    protocol= ESP, transform= esp-des esp-md5-hmac , 
    lifedur= 28800s and 4608000kb, 
    spi= 0x28976548(681010504), conn_id= 4, keysize= 0, flags= 0x4

VPN Peer: IPSEC: Peer ip:209.165.202.129/500 
Ref cnt incremented to:2 Total VPN Peers:1
VPN Peer: IPSEC: Peer ip:209.165.202.129/500 
Ref cnt incremented to:3 Total VPN Peers:1
return status is IKMP_NO_ERROR

Depuraciones al Conectar el Cliente VPN al PIX del Hub

crypto_isakmp_process_block:src:10.48.68.2, 
dest:209.165.200.225 spt:500 dpt:500OAK_AG exchange
ISAKMP (0): processing SA payload. message ID = 0
ISAKMP (0): Checking ISAKMP transform 1 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash SHA
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 256
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 2 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 256
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 3 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash SHA
ISAKMP:      default group 2
ISAKMP:      auth pre-share
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 256
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 4 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      auth pre-share
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 256
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 5 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash SHA
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 128
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 6 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 128
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 7 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash SHA
ISAKMP:      default group 2
ISAKMP:      auth pre-share
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 128
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 8 against priority 10 policy
ISAKMP:      encryption AES-CBC
ISAKMP:      hash MD5
ISAKMP:      default group 2
ISAKMP:      auth pre-share
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP:      keylength of 128
ISAKMP (0): atts are not acceptable. Next payload is 3
ISAKMP (0): Checking ISAKMP transform 9 against priority 10 policy
ISAKMP:      encryption 3DES-CBC
ISAKMP:      hash SHA
ISAKMP:      default group 2
ISAKMP:      extended auth pre-share (init)
ISAKMP:      life type in seconds
ISAKMP:      life duration (VPI) of  0x0 0x20 0xc4 0x9b 
ISAKMP (0): atts are not acceptable.
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
ISAKMP_TRANSACTION exchange
ISAKMP (0:0): processing transaction payload from 10.48.68.2.message ID = 17138612
ISAKMP: Config payload CFG_REPLY return status is IKMP_ERR_NO_RETRANS
ISAKMP (0:0): initiating peer config to 10.48.68.2. ID = 134858975 (0x809c8df)
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
ISAKMP_TRANSACTION exchange
ISAKMP (0:0): processing transaction payload from 10.48.68.2. message ID = 17138612
ISAKMP: Config payload CFG_ACK
return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
ISAKMP_TRANSACTION exchange
ISAKMP (0:0): processing transaction payload from 10.48.68.2. message ID = 17138612
ISAKMP: Config payload CFG_REQUEST
ISAKMP (0:0): checking request:
ISAKMP: attribute    IP4_ADDRESS (1)
ISAKMP: attribute    IP4_NETMASK (2)
ISAKMP: attribute    IP4_DNS (3)
ISAKMP: attribute    IP4_NBNS (4)
ISAKMP: attribute    ADDRESS_EXPIRY (5)
        Unsupported Attr: 5
ISAKMP: attribute    UNKNOWN (28672)
        Unsupported Attr: 28672
ISAKMP: attribute    UNKNOWN (28673)
        Unsupported Attr: 28673
ISAKMP: attribute    ALT_DEF_DOMAIN (28674)
ISAKMP: attribute    ALT_SPLIT_INCLUDE (28676)
ISAKMP: attribute    ALT_SPLITDNS_NAME (28675)
ISAKMP: attribute    ALT_PFS (28679)
ISAKMP: attribute    ALT_BACKUP_SERVERS (28681)
ISAKMP: attribute    APPLICATION_VERSION (7)
ISAKMP: attribute    UNKNOWN (28680)
        Unsupported Attr: 28680
ISAKMP: attribute    UNKNOWN (28682)
        Unsupported Attr: 28682
ISAKMP: attribute    UNKNOWN (28677)
        Unsupported Attr: 28677
ISAKMP (0:0): responding to peer config from 10.48.68.2. ID = 1128513895
return status is IKMP_NO_ERROR
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
OAK_QM exchange
oakley_process_quick_mode:
OAK_QM_IDLE
ISAKMP (0): processing SA payload. message ID = 3681346539
ISAKMP : Checking IPSec proposal 1
ISAKMP: transform 1, ESP_AES
ISAKMP:   attributes in transform:
ISAKMP:      authenticator is HMAC-MD5
ISAKMP:      key length is 256
ISAKMP:      encaps is 1
ISAKMP:      SA life type in seconds
ISAKMP:      SA life duration (VPI) of  0x0 0x20 0xc4 0x9b 
IPSEC(validate_proposal): transform proposal (prot 3, trans 12, hmac_alg 1) not supported
ISAKMP (0): atts not acceptable. Next payload is 0
ISAKMP (0): skipping next ANDed proposal (1)
ISAKMP : Checking IPSec proposal 2
ISAKMP: transform 1, ESP_AES
ISAKMP:   attributes in transform:
ISAKMP:      authenticator is HMAC-SHA
ISAKMP:      key length is 256
ISAKMP:      encaps is 1
ISAKMP:      SA life type in seconds
ISAKMP:      SA life duration (VPI) of  0x0 0x20 0xc4 0x9b 
IPSEC(validate_proposal): transform proposal (prot 3, trans 12, hmac_alg 2) not supported
ISAKMP (0): atts not acceptable. Next payload is 0
ISAKMP (0): skipping next ANDed proposal (2)
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
hub(config)# 
hub(config)# 
hub(config)# 
hub(config)# 
crypto_isakmp_process_block:src:10.48.68.2, dest:209.165.200.225 spt:500 dpt:500
ISAKMP (0): processing NOTIFY payload 36136 protocol 1
        spi 0, message ID = 3784834735
ISAMKP (0): received DPD_R_U_THERE from peer 10.48.68.2
ISAKMP (0): sending NOTIFY message 36137 protocol 1
return status is IKMP_NO_ERR_NO_TRANS

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