使用预共享密钥在Windows 8 PC和ASA之间配置L2TP Over IPsec

简介

本文档介绍如何使用思科自适应安全设备(ASA)和Windows 8本地客户端之间的预共享密钥配置基于IPsec的第2层隧道协议(L2TP)。

L2TP over Internet Protocol security(IPsec)能够在单个平台上部署和管理L2TP虚拟专用网络(VPN)解决方案以及IPsec VPN和防火墙服务。

先决条件

要求

Cisco 建议您了解以下主题：

• 从客户端计算机到ASA的IP连接。要测试连接，请尝试从客户端终端ping ASA的IP地址，反之亦然
• 确保UDP端口500和4500以及封装安全负载(ESP)协议在连接路径中的任何位置都不会被阻止

限制

• L2TP over IPsec仅支持IKEv1。不支持IKEv2。
• 在ASA上使用IPsec的L2TP允许LNS与集成在Windows、MAC OS X、Android和Cisco IOS等操作系统中的本地VPN客户端进行互操作。仅支持使用IPsec的L2TP，ASA不支持本地L2TP本身。
• Windows客户端支持的最低IPsec安全关联生存时间为300秒。如果ASA上的生存时间设置为少于300秒，Windows客户端将忽略该生存时间并将其替换为300秒生存时间。
• ASA仅支持本地数据库上的点对点协议(PPP)身份验证密码身份验证协议(PAP)和Microsoft质询握手身份验证协议(CHAP)版本1和2。可扩展身份验证协议(EAP)和CHAP由代理身份验证服务器执行。因此，如果远程用户属于使用authentication eap-proxy或authentication chap命令配置的隧道组，并且ASA配置为使用本地数据库，则该用户无法连接。

支持的PPP身份验证类型

ASA上的L2TP over IPsec连接仅支持表中所示的PPP身份验证类型 

使用的组件

本文档中的信息基于以下软件和硬件版本：

• 运行软件版本9.4(1)的Cisco 5515系列ASA
• L2TP/IPSec客户端(Windows 8)

本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始（默认）配置。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。

相关产品

此配置也可与 Cisco ASA 5500 系列安全设备 8.3(1) 一起使用。

规则

有关文档规则的详细信息，请参阅Cisco技术提示规则

背景信息

第2层隧道协议(L2TP)是一种VPN隧道协议，允许远程客户端使用公共IP网络与专用企业网络服务器进行安全通信。L2TP使用PPP over UDP（端口1701）来建立数据隧道。

L2TP协议基于客户端/服务器模型。功能在L2TP网络服务器(LNS)和L2TP访问集中器(LAC)之间划分。 LNS通常在网络网关（例如，本例中的ASA）上运行，而LAC可以是拨号网络访问服务器(NAS)或带有捆绑的L2TP客户端（例如Microsoft Windows、Apple iPhone或Android）的终端设备。

配置

本节介绍用于配置本文档中所述功能的信息。

注意：有关本文档所用命令的详细信息，请使用命令查找工具（仅限注册用户）。

注意：此配置中使用的 IP 编址方案在 Internet 上不可合法路由。这些地址是在实验室环境中使用的 RFC 1918 地址。

网络图

全通道配置

使用自适应安全设备管理器(ASDM)的ASA配置

完成这些步骤：

步骤1.登录到ASDM，然后导航到Wizards > VPN Wizards > Ipsec(IKEv1)Remote Access VPN Wizard。

步骤2.出现Remote Access VPN设置窗口。从下拉列表中，选择必须终止VPN隧道的接口。在本示例中，外部接口连接到WAN，因此在此接口上终止VPN隧道。保留Enable inbound IPSec sessions to bypass interface access lists框。组策略和每用户授权访问列表仍然应用于检查的流量，因此无需在外部接口上配置新的访问列表来允许客户端访问内部资源。单击 Next。

步骤3.如本图所示，选择客户端类型作为Microsoft Windows客户端，使用L2TP over IPSec和MS-CHAP-V1以及MS-CHAP-V2作为PPP身份验证协议，因为PAP不安全，并且使用LOCAL数据库作为身份验证服务器不支持其他身份验证类型，然后单击下一步。

步骤4.将身份验证方法选择为Pre-shared-key，然后在客户端键入必须相同的预共享密钥，然后单击Next，如下图所示。

步骤5.指定对尝试通过IPsec进行L2TP连接的用户进行身份验证的方法。可以使用外部AAA身份验证服务器或自己的本地数据库。如果要根据ASA的本地数据库对客户端进行身份验证，请选择Authenticate using the local user database，然后单击Next。

注意：请参阅为VPN用户配置RADIUS身份验证，以使用外部AAA服务器对用户进行身份验证。

步骤6.要将新用户添加到本地数据库以进行用户身份验证，请输入用户名和密码，然后单击ADD或可以使用数据库中的现有用户帐户，如下图所示。单击 Next。

步骤7.从下拉列表中选择用于为客户端分配IP地址的地址池。要创建新地址池，请点击新建，如图所示。

步骤8.出现Add IPv4 Pool对话框。

1. 输入新 IP 地址池的名称。
2. 输入起始和结束 IP 地址。
3. 输入子网掩码并单击 确定.

步骤9.检验池设置，然后点击下一步。

步骤10.配置要推送到客户端的属性，或将其留空，然后点击下一步。

步骤 11：确保未选中Enable Perfect Forwarding Secrecy(PFS)框，因为某些客户端平台不支持此功能。启用分割隧道，使远程用户能够同时加密访问上面定义的资源，取消选中对互联网盒(Internet box)的未加密访问，这意味着启用完整隧道，其中来自客户端的所有流量（包括互联网流量）将通过VPN隧道发送到ASA。单击 Next。

步骤12.查看摘要信息，然后单击完成。

使用CLI配置ASA

步骤1.配置IKE第1阶段策略参数。

此策略用于保护对等体之间的控制流量（即，保护预共享密钥和阶段2协商）

ciscoasa(config)#crypto ikev1 policy 10
ciscoasa(config-ikev1-policy)#authentication pre-share
ciscoasa(config-ikev1-policy)#encryption 3des
ciscoasa(config-ikev1-policy)#hash sha
ciscoasa(config-ikev1-policy)#group 2
ciscoasa(config-ikev1-policy)#lifetime 86400
ciscoasa(config-ikev1-policy)#exit 

步骤2.配置转换集。

它包含用于保护数据流量的IKE第2阶段策略参数。由于Windows L2TP/IPsec客户端使用IPsec传输模式，请将模式设置为传输。默认值为隧道模式

ciscoasa(config)#crypto ipsec ikev1 transform-set TRANS-ESP-3DES-SHA esp-3des esp-sha-hmac
ciscoasa(config)#crypto ipsec ikev1 transform-set TRANS-ESP-3DES-SHA mode transport

步骤3.配置动态映射。

当Windows客户端从ISP或本地DHCP服务器（示例调制解调器）获取动态IP地址时，ASA并不知道对等IP地址，这会导致ASA端上的静态对等配置出现问题。因此，必须采用动态加密配置，其中不必定义所有参数，且缺失的参数稍后会动态获知，这是客户端IPSec协商的结果。

ciscoasa(config)#crypto dynamic-map outside_dyn_map 10 set ikev1 transform-set TRANS-ESP-3DES-SHA

步骤4.将动态映射绑定到静态加密映射并应用加密映射并在外部接口上启用IKEv1

无法在接口上应用动态加密映射，因此将其绑定到静态加密映射。动态加密集应该是加密映射集中优先级最低的加密映射（即，它们应具有最高序列号），以便ASA首先评估其他加密映射。仅当其他（静态）映射条目不匹配时，它才会检查动态加密映射集。

ciscoasa(config)#crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
ciscoasa(config)#crypto map outside_map interface outside
ciscoasa(config)#crypto ikev1 enable outside

步骤5.创建IP地址池

创建地址池，从地址池将IP地址动态分配给远程VPN客户端。忽略此步骤以使用ASA上的现有池。

ciscoasa(config)#ip local pool Address-pool 192.168.1.1-192.168.1.254 mask 255.255.255.0

步骤6.配置组策略

将组策略标识为内部，这意味着从本地数据库中提取属性。

ciscoasa(config)#group-policy L2TP-VPN internal

注意：L2TP/IPsec连接可以使用默认组策略(DfltGrpPolicy)或用户定义的组策略进行配置。在任何一种情况下，必须将组策略配置为使用L2TP/IPsec隧道协议。在默认组策略的VPN协议属性上配置l2tp-ipsec，如果未配置vpn-protocol属性，则该默认组策略将继承给用户定义的组策略。

配置vpn隧道协议（在本例中为l2tp-ipsec）、域名、DNS和WINS服务器IP地址以及新用户帐户等属性

ciscoasa(config)#group-policy L2TP-VPN attributes
ciscoasa(config-group-policy)#dns-server value 8.8.8.8 4.4.4.2
ciscoasa(config-group-policy)#vpn-tunnel-protocol l2tp-ipsec
ciscoasa(config-group-policy)#default-domain value cisco.com

除使用AAA外，还可在设备上配置用户名和密码。如果用户是使用Microsoft CHAP版本1或版本2的L2TP客户端，并且ASA配置为根据本地数据库进行身份验证，则必须包含mschap关键字。例如，username <username> password <password> mschap。

ciscoasa(config-group-policy)# username test password test mschap

步骤7.配置隧道组

使用tunnel-group命令创建隧道组，并指定用于将IP地址分配给客户端的本地地址池名称。如果身份验证方法是预共享密钥，则隧道组名称必须是DefaultRAGroup，因为客户端上没有指定隧道组的选项，因此它仅停留在默认隧道组。使用default-group-policy命令将组策略绑定到隧道组

ciscoasa(config)#tunnel-group DefaultRAGroup general-attributes
ciscoasa(config-tunnel-general)#address-pool Address-pool
ciscoasa(config-tunnel-general)#default-group-policy L2TP-VPN
ciscoasa(config-tunnel-general)#exit 

注意：如果执行基于预共享密钥的身份验证，则必须配置默认连接配置文件（隧道组）DefaultRAGroup。如果执行基于证书的身份验证，可以根据证书标识符选择用户定义的连接配置文件

使用tunnel-group ipsec-attributes命令进入ipsec-attribute配置模式以设置预共享密钥。

ciscoasa(config)# tunnel-group DefaultRAGroup ipsec-attributes
ciscoasa(config-tunnel-ipsec)#  ikev1 pre-shared-key C!sc0@123
ciscoasa(config-tunnel-ipsec)#exit 

在隧道组ppp-attributes模式下使用authentication type命令配置PPP身份验证协议。禁用CHAP，如果AAA服务器配置为本地数据库，则默认启用，因为不支持该CHAP。

ciscoasa(config)#tunnel-group DefaultRAGroup ppp-attributes
ciscoasa(config-ppp)#no authentication chap
ciscoasa(config-ppp)#authentication ms-chap-v2
ciscoasa(config-ppp)#exit 

步骤8.配置NAT免除

配置NAT-Exemption，以便客户端可以访问连接到内部接口的内部资源（在本示例中，内部资源连接到内部接口）。

ciscoasa(config)#object network L2TP-Pool
ciscoasa(config-network-object)#subnet 192.168.1.0 255.255.255.0
ciscoasa(config-network-object)#exit
ciscoasa(config)# nat (inside,outside) source static any any destination static L2TP-Pool L2TP-Pool no-proxy-arp route-lookup

完整配置示例

crypto ikev1 policy 10
 authentication pre-share
 encryption 3des
 hash sha
 group 2
 lifetime 86400
 exit

crypto ipsec ikev1 transform-set TRANS-ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec ikev1 transform-set TRANS-ESP-3DES-SHA mode transport

crypto dynamic-map outside_dyn_map 10 set ikev1 transform-set TRANS-ESP-3DES-SHA

crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
crypto ikev1 enable outside

ip local pool Address-pool 192.168.1.1-192.168.1.254 mask 255.255.255.0

group-policy L2TP-VPN internal
group-policy L2TP-VPN attributes
 vpn-tunnel-protocol l2tp-ipsec
 default-domain value cisco.com
 username test password test mschap
 exit

tunnel-group DefaultRAGroup general-attributes
 address-pool Address-pool
 default-group-policy L2TP-VPN
 exit

tunnel-group DefaultRAGroup ipsec-attributes
 ikev1 pre-shared-key C!sc0@123
 exit

tunnel-group DefaultRAGroup ppp-attributes
 no authentication chap
 authentication ms-chap-v2
 exit

object network L2TP-Pool
 subnet 192.168.1.0 255.255.255.0
 exit
nat(inside,outside) source static any any destination static L2TP-Pool L2TP-Pool no-proxy-arp route-lookup

Windows 8 L2TP/IPsec客户端配置

1.打开“控制面板”，然后选择“网络和共享中心”。

2.选择设置新连接或网络选项。

3.选择“连接到工作空间”选项并单击“下一步”。

4.单击Use my Internet connection(VPN)选项。

5.输入ASA的WAN接口的IP地址或FQDN以及VPN适配器在本地有效的任何名称，然后单击Create。

6.在“网络和共享中心”上，选择窗口左侧窗格中的更改适配器设置选项。

7.右键单击最近为L2TP VPN创建的适配器，然后选择属性。

8.导航到Security选项卡，选择Type of VPN as Layer 2 Tunneling Protocol with IPsec(L2TP/IPsec)，然后单击Advanced settings。

9.输入预共享密钥，与隧道组DefaultRAGroup中提到的密钥相同，然后单击OK。在本示例中，C!sc0@123用作预共享密钥。

10.将身份验证方法选择为“允许这些协议”，并确保仅选中“Microsoft CHAP Version 2(MS-CHAP v2)”复选框，然后单击确定。

11.在“网络连接”下，右键单击L2TP VPN适配器，然后选择连接/断开。

12.将弹出网络图标，然后单击Connect on L2TP VPN connection。

13.输入用户凭证，然后单击确定。

如果两端都匹配了所需的参数，则将建立L2TP/IPsec连接。

拆分隧道配置

分割隧道功能可用于定义必须加密的子网或主机的流量。这涉及配置与此功能关联的访问控制列表(ACL)。此ACL上定义的子网或主机的流量通过隧道从客户端进行加密，这些子网的路由安装在PC路由表中。ASA会拦截来自客户端的DHCPINFORM消息，并使用子网掩码、域名和无类静态路由做出响应。

ASA上的配置

ciscoasa(config)# access-list SPLIT standard permit 10.1.1.0 255.255.255.0

ciscoasa(config)# group-policy DefaultRAGroup attributes
ciscoasa(config-group-policy)# split-tunnel-policy tunnelspecified
ciscoasa(config-group-policy)# split-tunnel-network-list value SPLIT
ciscoasa(config-group-policy)# intercept-dhcp 255.255.255.255 enable 

L2TP/IPsec客户端上的配置

1.右键单击L2TP VPN适配器，然后选择属性。

2.导航到“网络”选项卡，选择“Internet协议版本4(TCP/IPv4)”，然后单击“属性”。

3.单击Advanced选项。

 4.取消选中Use default gateway on remote network选项，然后单击OK。

验证

使用本部分可确认配置能否正常运行。

注意：命令输出解释程序工具（仅限注册用户）支持某些 show 命令。使用输出解释器工具来查看 show 命令输出的分析。

• show crypto ikev1 sa — 显示对等体上的所有当前IKE SA。

ciscoasa# show crypto ikev1 sa

IKEv1 SAs:

   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: 

10.1.1.2

    Type    : user            Role    : responder
    Rekey   : no              

State   : MM_ACTIVE

• show crypto ipsec sa - 显示对等体上的所有当前 IPsec SA。

ciscoasa# show crypto ipsec sa
interface: outside
    Crypto map tag: 

outside_dyn_map

, seq num: 10, local addr: 172.16.1.2

      local ident (addr/mask/prot/port): (172.16.1.2/255.255.255.255/

17/1701

)
      remote ident (addr/mask/prot/port): (10.1.1.2/255.255.255.255/

17/1701

)
      

current_peer: 10.1.1.2, username: test

dynamic allocated peer ip: 192.168.1.1

      dynamic allocated peer ip(ipv6): 0.0.0.0

      

#pkts encaps: 29, #pkts encrypt: 29, #pkts digest: 29

      #pkts decaps: 118, #pkts decrypt: 118, #pkts verify: 118

      #pkts compressed: 0, #pkts decompressed: 0
      #pkts not compressed: 29, #pkts comp failed: 0, #pkts decomp failed: 0
      #post-frag successes: 0, #post-frag failures: 0, #fragments created: 0
      #PMTUs sent: 0, #PMTUs rcvd: 0, #decapsulated frgs needing reassembly: 0
      #TFC rcvd: 0, #TFC sent: 0
      #Valid ICMP Errors rcvd: 0, #Invalid ICMP Errors rcvd: 0
      #send errors: 0, #recv errors: 0

      local crypto endpt.: 172.16.1.2/0, remote crypto endpt.: 10.1.1.2/0
      path mtu 1500, ipsec overhead 58(36), media mtu 1500
      PMTU time remaining (sec): 0, DF policy: copy-df
      ICMP error validation: disabled, TFC packets: disabled
      current outbound spi: E8AF927A
      current inbound spi : 71F346AB

    inbound esp sas:
      spi: 0x71F346AB (1911768747)
         transform: esp-3des esp-sha-hmac no compression
         in use settings ={RA, Transport, IKEv1, }
         slot: 0, conn_id: 4096, crypto-map: outside_dyn_map
         sa timing: remaining key lifetime (kB/sec): (237303/3541)
         IV size: 8 bytes
         replay detection support: Y
         Anti replay bitmap:
          0x00000000 0x00000003
    outbound esp sas:
      spi: 0xE8AF927A (3903820410)
         transform: esp-3des esp-sha-hmac no compression
         in use settings ={RA, Transport, IKEv1, }
         slot: 0, conn_id: 4096, crypto-map: outside_dyn_map
         sa timing: remaining key lifetime (kB/sec): (237303/3541)
         IV size: 8 bytes
         replay detection support: Y
         Anti replay bitmap:
          0x00000000 0x00000001

• show vpn-sessiondb detail ra-ikev1-ipsec filter protocol l2tpOverIpSec — 显示有关L2TP over IPsec连接的详细信息。
  

ciscoasa# show vpn-sessiondb detail ra-ikev1-ipsec filter protocol l2tpOverIpSec

Session Type: IKEv1 IPsec Detailed

Username     : test

                   Index        : 1

Assigned IP  : 192.168.1.1            Public IP    : 10.1.1.2

Protocol     : IKEv1 IPsec L2TPOverIPsec
License      : Other VPN
Encryption   : IKEv1: (1)3DES  IPsec: (1)3DES  L2TPOverIPsec: (1)none
Hashing      : IKEv1: (1)SHA1  IPsec: (1)SHA1  L2TPOverIPsec: (1)none
Bytes Tx     : 1574                   Bytes Rx     : 12752
Pkts Tx      : 29                     Pkts Rx      : 118
Pkts Tx Drop : 0                      Pkts Rx Drop : 0

Group Policy : L2TP-VPN               Tunnel Group : DefaultRAGroup

Login Time   : 23:32:48 UTC Sat May 16 2015
Duration     : 0h:04m:05s
Inactivity   : 0h:00m:00s
VLAN Mapping : N/A                    VLAN         : none
Audt Sess ID : 0a6a2577000010005557d3a0
Security Grp : none

IKEv1 Tunnels: 1
IPsec Tunnels: 1
L2TPOverIPsec Tunnels: 1

IKEv1:

  Tunnel ID    : 1.1
  UDP Src Port : 500                    UDP Dst Port : 500
  IKE Neg Mode : Main                   Auth Mode    : preSharedKeys
  Encryption   : 3DES                   Hashing      : SHA1
  Rekey Int (T): 28800 Seconds          Rekey Left(T): 28555 Seconds
  D/H Group    : 2
  Filter Name  :

IPsec:

  Tunnel ID    : 1.2
  Local Addr   : 172.16.1.2/255.255.255.255/17/1701
  Remote Addr  : 10.1.1.2/255.255.255.255/17/1701
  Encryption   : 3DES                   Hashing      : SHA1
  Encapsulation: Transport
  Rekey Int (T): 3600 Seconds           Rekey Left(T): 3576 Seconds
  Rekey Int (D): 250000 K-Bytes         Rekey Left(D): 250000 K-Bytes
  Idle Time Out: 30 Minutes             Idle TO Left : 29 Minutes
  Bytes Tx     : 1574                   Bytes Rx     : 12752
  Pkts Tx      : 29                     Pkts Rx      : 118

L2TPOverIPsec:

  Tunnel ID    : 1.3

  Username     : test

  Assigned IP  : 192.168.1.1

Public IP    : 10.1.1.2

  Encryption   : none                   Hashing      : none

  Auth Mode    : msCHAPV2

  Idle Time Out: 30 Minutes             Idle TO Left : 27 Minutes
  Client OS    : Microsoft
  Client OS Ver: 6.2
  Bytes Tx     : 475                    Bytes Rx     : 9093
  Pkts Tx      : 18                     Pkts Rx      : 105

 在ASDM上，在Monitoring > VPN > VPN Statistics > Sessions下可以查看有关VPN会话的一般信息。L2TP over IPsec会话可以通过IPsec(IKEv1)Remote Access > Protocol > L2TP Over IPsec进行过滤。

故障排除

本部分提供了可用于对配置进行故障排除的信息。

注意：使用 debug 命令之前，请参阅有关 Debug 命令的重要信息。

警告：在ASA上，您可以设置各种调试级别；默认情况下，使用级别1。如果更改调试级别，调试的详细程度可能会增加。请谨慎执行此操作，尤其是在生产环境中！

请谨慎使用以下debug命令以排除VPN隧道故障

• debug crypto ikev1 — 显示有关IKE的调试信息
• debug crypto ipsec — 显示有关IPsec的调试信息

以下是成功的L2TP over IPSec连接的调试输出：

May 18 04:17:18 [IKEv1]IKE Receiver: Packet received on 172.16.1.2:500 from 10.1.1.2:500
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE RECEIVED Message (msgid=0) with payloads : HDR + SA (1) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + NONE (0) total length : 408
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing SA payload
May 18 04:17:18 [IKEv1]Phase 1 failure:  Mismatched attribute types for class Group Description:  Rcv'd: Unknown  Cfg'd: Group 2
May 18 04:17:18 [IKEv1]Phase 1 failure:  Mismatched attribute types for class Group Description:  Rcv'd: Unknown  Cfg'd: Group 2
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Oakley proposal is acceptable
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Received NAT-Traversal RFC VID
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Received NAT-Traversal ver 02 VID
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Received Fragmentation VID
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing IKE SA payload
May 18 04:17:18 [IKEv1]Phase 1 failure:  Mismatched attribute types for class Group Description:  Rcv'd: Unknown  Cfg'd: Group 2
May 18 04:17:18 [IKEv1]Phase 1 failure:  Mismatched attribute types for class Group Description:  Rcv'd: Unknown  Cfg'd: Group 2
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, 

IKE SA Proposal # 1, Transform # 5 acceptable  Matches global IKE entry # 2

May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing ISAKMP SA payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing NAT-Traversal VID ver RFC payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing Fragmentation VID + extended capabilities payload
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE SENDING Message (msgid=0) with payloads : HDR + SA (1) + VENDOR (13) + VENDOR (13) + NONE (0) total length : 124
May 18 04:17:18 [IKEv1]IKE Receiver: Packet received on 172.16.1.2:500 from 10.1.1.2:500
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE RECEIVED Message (msgid=0) with payloads : HDR + KE (4) + NONCE (10) + NAT-D (20) + NAT-D (20) + NONE (0) total length : 260
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing ke payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing ISA_KE payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing nonce payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing NAT-Discovery payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, computing NAT Discovery hash
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, processing NAT-Discovery payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, computing NAT Discovery hash
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing ke payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing nonce payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing Cisco Unity VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing xauth V6 VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Send IOS VID
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Constructing ASA spoofing IOS Vendor ID payload (version: 1.0.0, capabilities: 20000001)
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing VID payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, Send Altiga/Cisco VPN3000/Cisco ASA GW VID
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing NAT-Discovery payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, computing NAT Discovery hash
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, constructing NAT-Discovery payload
May 18 04:17:18 [IKEv1 DEBUG]IP = 10.1.1.2, computing NAT Discovery hash
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, 

Connection landed on tunnel_group DefaultRAGroup

May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Generating keys for Responder...
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE SENDING Message (msgid=0) with payloads : HDR + KE (4) + NONCE (10) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + NAT-D (20) + NAT-D (20) + NONE (0) total length : 304
May 18 04:17:18 [IKEv1]IKE Receiver: Packet received on 172.16.1.2:500 from 10.1.1.2:500
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE RECEIVED Message (msgid=0) with payloads : HDR + ID (5) + HASH (8) + NONE (0) total length : 64
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing ID payload
May 18 04:17:18 [IKEv1 DECODE]Group = DefaultRAGroup, IP = 10.1.1.2, ID_IPV4_ADDR ID received
10.1.1.2
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing hash payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Computing hash for ISAKMP
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

Automatic NAT Detection Status:     Remote end is NOT behind a NAT device     This   end is NOT behind a NAT device

May 18 04:17:18 [IKEv1]IP = 10.1.1.2, Connection landed on tunnel_group DefaultRAGroup
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing ID payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing hash payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Computing hash for ISAKMP
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing dpd vid payload
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE SENDING Message (msgid=0) with payloads : HDR + ID (5) + HASH (8) + VENDOR (13) + NONE (0) total length : 84
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

PHASE 1 COMPLETED

May 18 04:17:18 [IKEv1]IP = 10.1.1.2, Keep-alive type for this connection: None
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, Keep-alives configured on but peer does not support keep-alives (type = None)
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Starting P1 rekey timer: 21600 seconds.
May 18 04:17:18 [IKEv1]IKE Receiver: Packet received on 172.16.1.2:500 from 10.1.1.2:500
May 18 04:17:18 [IKEv1 DECODE]IP = 10.1.1.2, IKE Responder starting QM: msg id = 00000001
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE RECEIVED Message (msgid=1) with payloads : HDR + HASH (8) + SA (1) + NONCE (10) + ID (5) + ID (5) + NONE (0) total length : 300
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing hash payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing SA payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing nonce payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing ID payload
May 18 04:17:18 [IKEv1 DECODE]Group = DefaultRAGroup, IP = 10.1.1.2, ID_IPV4_ADDR ID received
10.1.1.2
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

Received remote Proxy Host data in ID Payload:  Address 10.1.1.2, Protocol 17, Port 1701

May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing ID payload
May 18 04:17:18 [IKEv1 DECODE]Group = DefaultRAGroup, IP = 10.1.1.2, ID_IPV4_ADDR ID received
172.16.1.2
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

Received local Proxy Host data in ID Payload:  Address 172.16.1.2, Protocol 17, Port 1701

May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

L2TP/IPSec session detected.

May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, QM IsRekeyed old sa not found by addr
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

Static Crypto Map check, map outside_dyn_map, seq = 10 is a successful match

May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, IKE Remote Peer configured for crypto map: outside_dyn_map
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing IPSec SA payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, I

PSec SA Proposal # 2, Transform # 1 acceptable

  Matches global IPSec SA entry # 10
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, IKE: requesting SPI!
IPSEC: New embryonic SA created @ 0x00007fffe13ab260, 
    SCB: 0xE1C00540, 
    Direction: inbound
    SPI      : 0x7AD72E0D
    Session ID: 0x00001000
    VPIF num  : 0x00000002
    Tunnel type: ra
    Protocol   : esp
    Lifetime   : 240 seconds
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, IKE got SPI from key engine: SPI = 0x7ad72e0d
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, oakley constucting quick mode
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing blank hash payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing IPSec SA payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing IPSec nonce payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing proxy ID
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, 

Transmitting Proxy Id:

  Remote host: 10.1.1.2  Protocol 17  Port 1701

  Local host:  172.16.1.2  Protocol 17  Port 1701

May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, constructing qm hash payload
May 18 04:17:18 [IKEv1 DECODE]Group = DefaultRAGroup, IP = 10.1.1.2, IKE Responder sending 2nd QM pkt: msg id = 00000001
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE SENDING Message (msgid=1) with payloads : HDR + HASH (8) + SA (1) + NONCE (10) + ID (5) + ID (5) + NONE (0) total length : 160
May 18 04:17:18 [IKEv1]IKE Receiver: Packet received on 172.16.1.2:500 from 10.1.1.2:500
May 18 04:17:18 [IKEv1]IP = 10.1.1.2, IKE_DECODE RECEIVED Message (msgid=1) with payloads : HDR + HASH (8) + NONE (0) total length : 52
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, processing hash payload
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, loading all IPSEC SAs
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Generating Quick Mode Key!
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, NP encrypt rule look up for crypto map outside_dyn_map 10 matching ACL Unknown: returned cs_id=e148a8b0; encrypt_rule=00000000; tunnelFlow_rule=00000000
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Generating Quick Mode Key!
IPSEC: New embryonic SA created @ 0x00007fffe1c75c00, 
    SCB: 0xE13ABD20, 
    Direction: outbound
    SPI      : 0x8C14FD70
    Session ID: 0x00001000
    VPIF num  : 0x00000002
    Tunnel type: ra
    Protocol   : esp
    Lifetime   : 240 seconds
IPSEC: Completed host OBSA update, SPI 0x8C14FD70
IPSEC: Creating outbound VPN context, SPI 0x8C14FD70
    Flags: 0x00000205
    SA   : 0x00007fffe1c75c00
    SPI  : 0x8C14FD70
    MTU  : 1500 bytes
    VCID : 0x00000000
    Peer : 0x00000000
    SCB  : 0x0AC609F9
    Channel: 0x00007fffed817200
IPSEC: Completed outbound VPN context, SPI 0x8C14FD70
    VPN handle: 0x00000000000028d4
IPSEC: New outbound encrypt rule, SPI 0x8C14FD70
    Src addr: 172.16.1.2
    Src mask: 255.255.255.255
    Dst addr: 10.1.1.2
    Dst mask: 255.255.255.255

    Src ports

      Upper: 1701

      Lower: 1701

      Op   : equal

    Dst ports

      Upper: 1701

      Lower: 1701

      Op   : equal
  

  Protocol: 17

    Use protocol: true
    SPI: 0x00000000
    Use SPI: false
IPSEC: Completed outbound encrypt rule, SPI 0x8C14FD70
    Rule ID: 0x00007fffe1c763d0
IPSEC: New outbound permit rule, SPI 0x8C14FD70
    Src addr: 172.16.1.2
    Src mask: 255.255.255.255
    Dst addr: 10.1.1.2
    Dst mask: 255.255.255.255
    Src ports
      Upper: 0
      Lower: 0
      Op   : ignore
    Dst ports
      Upper: 0
      Lower: 0
      Op   : ignore
    Protocol: 50
    Use protocol: true
    SPI: 0x8C14FD70
    Use SPI: true
IPSEC: Completed outbound permit rule, SPI 0x8C14FD70
    Rule ID: 0x00007fffe1c76a00
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, NP encrypt rule look up for crypto map outside_dyn_map 10 matching ACL Unknown: returned cs_id=e148a8b0; encrypt_rule=00000000; tunnelFlow_rule=00000000
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, Security negotiation complete for User ()  Responder, Inbound SPI = 0x7ad72e0d, Outbound SPI = 0x8c14fd70
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, IKE got a KEY_ADD msg for SA: SPI = 0x8c14fd70
IPSEC: New embryonic SA created @ 0x00007fffe13ab260, 
    SCB: 0xE1C00540, 
    Direction: inbound
    SPI      : 0x7AD72E0D
    Session ID: 0x00001000
    VPIF num  : 0x00000002
    Tunnel type: ra
    Protocol   : esp
    Lifetime   : 240 seconds
IPSEC: Completed host IBSA update, SPI 0x7AD72E0D
IPSEC: Creating inbound VPN context, SPI 0x7AD72E0D
    Flags: 0x00000206
    SA   : 0x00007fffe13ab260
    SPI  : 0x7AD72E0D
    MTU  : 0 bytes
    VCID : 0x00000000
    Peer : 0x000028D4
    SCB  : 0x0AC5BD5B
    Channel: 0x00007fffed817200
IPSEC: Completed inbound VPN context, SPI 0x7AD72E0D
    VPN handle: 0x0000000000004174
IPSEC: Updating outbound VPN context 0x000028D4, SPI 0x8C14FD70
    Flags: 0x00000205
    SA   : 0x00007fffe1c75c00
    SPI  : 0x8C14FD70
    MTU  : 1500 bytes
    VCID : 0x00000000
    Peer : 0x00004174
    SCB  : 0x0AC609F9
    Channel: 0x00007fffed817200
IPSEC: Completed outbound VPN context, SPI 0x8C14FD70
    VPN handle: 0x00000000000028d4
IPSEC: Completed outbound inner rule, SPI 0x8C14FD70
    Rule ID: 0x00007fffe1c763d0
IPSEC: Completed outbound outer SPD rule, SPI 0x8C14FD70
    Rule ID: 0x00007fffe1c76a00
IPSEC: New inbound tunnel flow rule, SPI 0x7AD72E0D
    Src addr: 10.1.1.2
    Src mask: 255.255.255.255
    Dst addr: 172.16.1.2
    Dst mask: 255.255.255.255
    Src ports
      Upper: 1701
      Lower: 1701
      Op   : equal
    Dst ports
      Upper: 1701
      Lower: 1701
      Op   : equal
    Protocol: 17
    Use protocol: true
    SPI: 0x00000000
    Use SPI: false
IPSEC: Completed inbound tunnel flow rule, SPI 0x7AD72E0D
    Rule ID: 0x00007fffe13aba90
IPSEC: New inbound decrypt rule, SPI 0x7AD72E0D
    Src addr: 10.1.1.2
    Src mask: 255.255.255.255
    Dst addr: 172.16.1.2
    Dst mask: 255.255.255.255
    Src ports
      Upper: 0
      Lower: 0
      Op   : ignore
    Dst ports
      Upper: 0
      Lower: 0
      Op   : ignore
    Protocol: 50
    Use protocol: true
    SPI: 0x7AD72E0D
    Use SPI: true
IPSEC: Completed inbound decrypt rule, SPI 0x7AD72E0D
    Rule ID: 0x00007fffe1c77420
IPSEC: New inbound permit rule, SPI 0x7AD72E0D
    Src addr: 10.1.1.2
    Src mask: 255.255.255.255
    Dst addr: 172.16.1.2
    Dst mask: 255.255.255.255
    Src ports
      Upper: 0
      Lower: 0
      Op   : ignore
    Dst ports
      Upper: 0
      Lower: 0
      Op   : ignore
    Protocol: 50
    Use protocol: true
    SPI: 0x7AD72E0D
    Use SPI: true
IPSEC: Completed inbound permit rule, SPI 0x7AD72E0D
    Rule ID: 0x00007fffe13abb80
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Pitcher: received KEY_UPDATE, spi 0x7ad72e0d
May 18 04:17:18 [IKEv1 DEBUG]Group = DefaultRAGroup, IP = 10.1.1.2, Starting P2 rekey timer: 3420 seconds.
May 18 04:17:18 [IKEv1]Group = DefaultRAGroup, IP = 10.1.1.2, 

PHASE 2 COMPLETED

 (msgid=00000001)
May 18 04:17:18 [IKEv1]IKEQM_Active() Add L2TP classification rules: ip <10.1.1.2> mask <0xFFFFFFFF> port <1701> 
May 18 04:17:21 [IKEv1]Group = DefaultRAGroup, 

Username = test, IP = 10.1.1.2, Adding static route for client address: 192.168.1.1

下表显示了Windows客户端上常见的一些与VPN相关的错误

相关信息

• Cisco ASA 5500 系列自适应安全设备
• 最常用的 L2L 和远程访问 IPSec VPN 故障排除解决方案
• 技术支持和文档 - Cisco Systems