使用NAT遍歷配置多個VPN客戶端到Cisco VPN 3000集中器

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已更新: 2004 年 5 月 4 日

文件 ID:26243

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簡介

本文檔介紹如何在位於埠地址轉換(PAT)/NAT裝置之後的Cisco VPN客戶端與遠端Cisco VPN集中器之間配置網路地址轉換穿越(NAT-T)。NAT-T可在VPN客戶端和VPN集中器之間使用，或在NAT/PAT裝置後的集中器之間使用。當連線到運行Cisco IOS^®軟體和PIX防火牆的Cisco路由器時，也可使用NAT-T;但是，本檔案不會討論這些設定。

必要條件

採用元件

本文中的資訊係根據以下軟體和硬體版本：

Cisco VPN 3000 Concentrator 4.0(1)B
Cisco VPN客戶端：3.6.1和4.0(3)版本
Cisco PIX防火牆（PAT裝置）版本6.3(3)

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路正在作用，請確保您已瞭解任何指令可能造成的影響。

網路圖表

本檔案會使用以下網路設定：

PIX防火牆後面兩台PC（10.10.10.2和10.10.10.3）上都有VPN客戶端。此場景中的PIX僅被用作PAT裝置，並對這些地址執行PAT到171.69.89.78。此處可以使用能夠執行PAT多個內部連線的任何裝置。VPN 3000集中器公共地址為172.16.172.50。以下示例演示如何配置客戶端和集中器，以便在IKE協商期間使用NAT-T。

NAT-T協商完成後，發起方可以使用任何隨機使用者資料包協定(UDP)埠(Y)。目的地連線埠必須是UDP 4500，如在UDP中(Y， 4500)，而回應器使用UDP(4500, Y)。所有後續的Internet金鑰交換(IKE)協商和金鑰更新均在這些埠上完成。在NAT-T協商期間，兩個IPSec對等體都會協商UDP埠，並確定它們是否位於NAT/PAT裝置之後。NAT/PAT裝置後面的IPSec對等體將IPSec-over-UDP NAT keepalive資料包傳送到不在NAT/PAT裝置後面的IPSec對等體。NAT-T使用埠4500將IPSec流量封裝在UDP資料包中，從而為NAT裝置提供埠資訊。NAT-T自動檢測任何NAT裝置，僅在必要時封裝IPSec流量。

在VPN 3000集中器上實施IPSec over NAT轉換時，IPSec over TCP首先優先，然後是NAT-T，最後是IPSec over UDP。預設情況下，NAT-T關閉。您需要使用位於NAT Transparency（NAT透明）下的覈取方塊(位於Tunneling Protocols（隧道協定）下的IPSec配置下)啟用NAT-T。此外，對於LAN到LAN隧道，必須在LAN到LAN配置IPSec NAT-T欄位下開啟NAT-T。

要使用NAT-T，您必須完成以下步驟：

在VPN集中器之前配置的任何防火牆上開啟埠4500。
使用埠4500將以前的IPSec/UDP配置重新配置為其他埠。
選擇Configuration > Interfaces > Ethernet，然後為分段策略引數選擇第二個或第三個選項。

這些選項允許流量在不支援IP分段的NAT裝置上傳輸；它們不會阻礙支援IP分段的NAT裝置的運行。

配置PIX

PIX的相關配置輸出如下所示：

PIX防火牆
pix501(config)# : Saved : PIX Version 6.3(3) nameif ethernet0 outside security0 nameif ethernet1 inside security100 ip address outside 171.69.89.78 255.255.254.0 ip address inside 10.10.10.1 255.255.255.0 ... global (outside) 1 interface nat (inside) 1 0.0.0.0 0.0.0.0 0 0 ... route outside 0.0.0.0 0.0.0.0 171.69.88.1 1 http server enable http 10.10.10.2 255.255.255.255 inside ... Cryptochecksum:6990adf6e0e2800ed409ae7364eecc9d : end [OK]

PIX防火牆

pix501(config)#
: Saved
:
PIX Version 6.3(3)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
ip address outside 171.69.89.78 255.255.254.0
ip address inside 10.10.10.1 255.255.255.0
...
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
...
route outside 0.0.0.0 0.0.0.0 171.69.88.1 1
http server enable
http 10.10.10.2 255.255.255.255 inside
...
Cryptochecksum:6990adf6e0e2800ed409ae7364eecc9d
: end

[OK]

配置VPN 3000 Concentrator

此示例配置假設VPN 3000集中器已配置用於IP連線，並且已建立標準（非NAT-T）VPN連線。

要在低於版本4.1的VPN 3000集中器版本上啟用NAT-T，請選擇Configurations > System > Tunneling protocols > IPSec > NAT Transparency，然後檢查集中器上的IPSec over NAT-T選項，如下例所示。預設情況下，NAT-T選項處於關閉狀態。

要在VPN集中器4.1版及更高版本上啟用NAT-T，請導航到相同的NAT透明視窗，方法是選擇Configuration > Tunneling and Security > IPSec > NAT Transparency。

配置VPN客戶端

要使用NAT-T，請選中Enable Transparent Tunneling。以下示例在版本4.0以上的VPN客戶端上演示了這一點。

注意：VPN客戶端版本3.x上提供相同的配置選項。

驗證

本節提供的資訊可用於確認您的組態是否正常運作。

輸出直譯器工具(僅供註冊客戶使用)支援某些show命令，此工具可讓您檢視show命令輸出的分析。

有關其他故障排除資訊，請參閱IP安全故障排除 — 瞭解和使用debug命令。

驗證PIX配置

以下命令用於驗證PIX配置：

show xlate — 如下面的輸出所示，PIX對兩個VPN客戶端使用不同的源埠，但目標埠相同。使用UDP埠4500包裝所有IPSec資料包。後續重新生成金鑰協商也使用相同的源埠和目的埠。
```
pix501(config)# show xlate
3 in use, 4 most used
PAT Global 171.69.89.78(1025) Local 10.10.10.3(4500)
PAT Global 171.69.89.78(1026) Local 10.10.10.2(4500)
PAT Global 171.69.89.78(4) Local 10.10.10.2(500)
```

show arp — 使用此命令顯示地址解析協定(ARP)表並確定是否正在處理ARP請求。

pix501(config)# show arp
        outside 171.69.88.3 00d0.0132.e40a
        outside 171.69.88.2 00d0.0133.3c0a
        outside 171.69.88.1 0000.0c07.ac7b
        inside 10.10.10.3 0050.dabb.f093
        inside 10.10.10.2 0001.0267.55cc
pix501(config)#

VPN客戶端統計資訊

建立VPN隧道後，按一下右鍵黃色鎖並選擇Status。下面顯示了類似的視窗。請注意，通道連線埠為UDP 4500，這證明您使用的是NAT-T。

VPN集中器統計資訊

請完成以下步驟：

在VPN集中器上，選擇Administration > Administrator Session。

在Remote Access Sessions下可以看到VPN客戶端會話。以下範例顯示兩個使用者端建立到VPN集中器的IPSec通道後的作業階段。它們都使用公有IP地址171.69.89.78，分別分配了40.1.1.1和40.1.1.2。
按兩下客戶端使用者名稱。

如以下示例所示，將顯示IPSec/IKE統計資訊。客戶端使用的UDP源埠為1029，使用的目的埠為4500。

疑難排解

本節提供的資訊可用於對組態進行疑難排解。

注意：發出debug命令之前，請參閱有關Debug命令的重要資訊。

注意：更多PIX故障排除資訊可在IP安全故障排除 — 瞭解和使用debug命令中找到。

VPN客戶端日誌

在安裝了VPN客戶端的PC上，開啟日誌檢視器，然後建立與VPN集中器的連線。此日誌輸出突出顯示特定於NAT的消息：

1      21:06:48.208  10/18/02  Sev=Info/6   DIALER/0x63300002
Initiating connection.
2      21:06:48.218  10/18/02  Sev=Info/4   CM/0x63100002
Begin connection process
3      21:06:48.218  10/18/02  Sev=Info/4   CM/0x63100004
Establish secure connection using Ethernet
4      21:06:48.218  10/18/02  Sev=Info/4   CM/0x63100026
Attempt connection with server "172.16.172.50"
42     21:07:42.326  10/18/02  Sev=Info/6  IKE/0x6300003B
Attempting to establish a connection with 172.16.172.50.
43     21:07:42.366  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK AG (SA, KE, NON, ID, VID, VID, VID, VID, VID)
 to 172.16.172.50
44     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
45     21:07:42.716  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK AG (SA, KE, NON, ID, HASH, VID, VID, VID,
 VID, NAT-D, NAT-D, VID, VID) from 172.16.172.50
46     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000059
Vendor ID payload = 12F5F28C457168A9702D9FE274CC0100
47     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000001
Peer is a Cisco-Unity compliant peer
48     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000059
Vendor ID payload = 09002689DFD6B712
49     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000001
Peer supports XAUTH
50     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000059
Vendor ID payload = AFCAD71368A1F1C96B8696FC77570100
51     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000001
Peer supports DPD
52     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000059
Vendor ID payload = 90CB80913EBB696E086381B5EC427B1F
53     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000001
Peer supports NAT-T
54     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000059
Vendor ID payload = 4048B7D56EBCE88525E7DE7F00D6C2D3C0000000
55     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000001
Peer supports IKE fragmentation payloads
56     21:07:42.716  10/18/02  Sev=Info/5  IKE/0x63000059
Vendor ID payload = 1F07F70EAA6514D3B0FA96542A500306
57     21:07:42.757  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK AG *(HASH, NOTIFY:STATUS_INITIAL_CONTACT, NAT-D,
 NAT-D) to 172.16.172.50
58     21:07:42.767  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
59     21:07:42.767  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK TRANS *(HASH, ATTR) from 172.16.172.50
60     21:07:42.767  10/18/02  Sev=Info/4  CM/0x63100015
Launch xAuth application
61     21:07:42.967  10/18/02  Sev=Info/4  IPSEC/0x63700014
Deleted all keys
62     21:07:59.801  10/18/02  Sev=Info/4  CM/0x63100017
xAuth application returned
63     21:07:59.801  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK TRANS *(HASH, ATTR) to 172.16.172.50
64     21:08:00.101  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
65     21:08:00.101  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK TRANS *(HASH, ATTR) from 172.16.172.50
66     21:08:00.101  10/18/02  Sev=Info/5  IKE/0x63000071
Automatic NAT Detection Status:
   Remote end is NOT behind a NAT device
   This end IS behind a NAT device
67     21:08:00.101  10/18/02  Sev=Info/4  CM/0x6310000E
Established Phase 1 SA.  1 Phase 1 SA in the system
68     21:08:00.111  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK TRANS *(HASH, ATTR) to 172.16.172.50
69     21:08:00.111  10/18/02  Sev=Info/5  IKE/0x6300005D
Client sending a firewall request to concentrator
70     21:08:00.111  10/18/02  Sev=Info/5  IKE/0x6300005C
Firewall Policy: Product=Cisco Integrated Client, Capability= 
(Centralized Protection Policy).
71     21:08:00.111  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK TRANS *(HASH, ATTR) to 172.16.172.50
72     21:08:00.122  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
73     21:08:00.122  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK TRANS *(HASH, ATTR) from 172.16.172.50
74     21:08:00.122  10/18/02  Sev=Info/5  IKE/0x63000010
MODE_CFG_REPLY: Attribute = INTERNAL_IPV4_ADDRESS: , value = 40.1.1.1
75     21:08:00.122  10/18/02  Sev=Info/5  IKE/0x6300000D
MODE_CFG_REPLY: Attribute = MODECFG_UNITY_SAVEPWD: , value = 0x00000000
76     21:08:00.122  10/18/02  Sev=Info/5  IKE/0x6300000D
MODE_CFG_REPLY: Attribute = MODECFG_UNITY_PFS: , value = 0x00000000
77     21:08:00.122  10/18/02  Sev=Info/5  IKE/0x6300000E
MODE_CFG_REPLY: Attribute = APPLICATION_VERSION, value = Cisco Systems, Inc.
/VPN 3000 Concentrator Version 3.6.1.Rel built by vmurphy on Aug 29 2002
 18:34:44
78     21:08:00.122  10/18/02  Sev=Info/5  IKE/0x6300000D
MODE_CFG_REPLY: Attribute = Recieved and using NAT-T port number , value = 
0x00001194
79     21:08:00.132  10/18/02  Sev=Info/4  CM/0x63100019
Mode Config data received
80     21:08:00.142  10/18/02  Sev=Info/5  IKE/0x63000055
Received a key request from Driver for IP address 172.16.172.50, GW IP = 
172.16.172.50
81     21:08:00.142  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK QM *(HASH, SA, NON, ID, ID) to 172.16.172.50
82     21:08:00.142  10/18/02  Sev=Info/5  IKE/0x63000055
Received a key request from Driver for IP address 10.10.10.255, GW IP = 
172.16.172.50
83     21:08:00.142  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK QM *(HASH, SA, NON, ID, ID) to 172.16.172.50
84     21:08:00.172  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
85     21:08:00.172  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK INFO *(HASH, NOTIFY:STATUS_RESP_LIFETIME) from 
172.16.172.50
86     21:08:00.172  10/18/02  Sev=Info/5  IKE/0x63000044
RESPONDER-LIFETIME notify has value of 86400 seconds
87     21:08:00.172  10/18/02  Sev=Info/5  IKE/0x63000046
This SA has already been alive for 18 seconds, setting expiry to 86382 
seconds from now
88     21:08:00.182  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
89     21:08:00.182  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK QM *(HASH, SA, NON, ID, ID, NOTIFY:STATUS_RESP_LIFETIME)
 from 172.16.172.50
90     21:08:00.182  10/18/02  Sev=Info/5  IKE/0x63000044
RESPONDER-LIFETIME notify has value of 28800 seconds
91     21:08:00.182  10/18/02  Sev=Info/4  IKE/0x63000013
SENDING >>> ISAKMP OAK QM *(HASH) to 172.16.172.50
92     21:08:00.182  10/18/02  Sev=Info/5  IKE/0x63000058
Loading IPsec SA (Message ID = 0x347A7363 OUTBOUND SPI = 0x02CC3526 INBOUND
 SPI = 0x5BEEBB4C)
93     21:08:00.182  10/18/02  Sev=Info/5  IKE/0x63000025
Loaded OUTBOUND ESP SPI: 0x02CC3526
94     21:08:00.182  10/18/02  Sev=Info/5  IKE/0x63000026
Loaded INBOUND ESP SPI: 0x5BEEBB4C
95     21:08:00.182  10/18/02  Sev=Info/4  CM/0x6310001A
One secure connection established
96     21:08:00.192  10/18/02  Sev=Info/6  DIALER/0x63300003
Connection established.
97     21:08:00.332  10/18/02  Sev=Info/5  IKE/0x6300002F
Received ISAKMP packet: peer = 172.16.172.50
98     21:08:00.332  10/18/02  Sev=Info/4  IKE/0x63000014
RECEIVING <<< ISAKMP OAK QM *(HASH, SA, NON, ID, ID, NOTIFY:STATUS_RESP_LIFETIME)
 from 172.16.172.50
99     21:08:00.332  10/18/02  Sev=Info/5  IKE/0x63000044
RESPONDER-LIFETIME notify has value of 28800 seconds
100    21:08:00.332  10/18/02  Sev=Info/4            IKE/0x63000013
SENDING >>> ISAKMP OAK QM *(HASH) to 172.16.172.50
101    21:08:00.342  10/18/02  Sev=Info/5            IKE/0x63000058
Loading IPsec SA (Message ID = 0x2F81FB2D OUTBOUND SPI = 0x3316C6C9 INBOUND 
SPI = 0x6B96ED76)
102    21:08:00.342  10/18/02  Sev=Info/5            IKE/0x63000025
Loaded OUTBOUND ESP SPI: 0x3316C6C9
103    21:08:00.342  10/18/02  Sev=Info/5            IKE/0x63000026
Loaded INBOUND ESP SPI: 0x6B96ED76
104    21:08:00.342  10/18/02  Sev=Info/4            CM/0x63100022
Additional Phase 2 SA established.
105    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x63700014
Deleted all keys
106    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x63700010
Created a new key structure
107    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x6370000F
Added key with SPI=0x2635cc02 into key list
108    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x63700010
Created a new key structure
109    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x6370000F
Added key with SPI=0x4cbbee5b into key list
110    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x63700010
Created a new key structure
111    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x6370000F
Added key with SPI=0xc9c61633 into key list
112    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x63700010
Created a new key structure
113    21:08:01.203  10/18/02  Sev=Info/4            IPSEC/0x6370000F
Added key with SPI=0x76ed966b into key list
114    21:08:10.216  10/18/02  Sev=Info/6            IKE/0x63000054
Sent a ping on the Public IPSec SA
115    21:08:20.381  10/18/02  Sev=Info/4            IKE/0x63000013
SENDING >>> ISAKMP OAK INFO *(HASH, NOTIFY:HEARTBEAT) to 172.16.172.50
116    21:08:20.381  10/18/02  Sev=Info/6            IKE/0x63000052
Sent a ping on the IKE SA

VPN集中器日誌

要檢視VPN集中器上的日誌，請選擇Monitoring > Filterable Event Log，然後選擇Event Classes IKE、IKEDBG、IKEDECODE和IPSECDBG（嚴重性為1到13）。

2835 10/20/2002 20:22:42.390 SEV=8 IKEDECODE/0 RPT=8190 171.69.89.78 
  Exchange Type :	Oakley Quick Mode
  Flags         :	1   (ENCRYPT )
  Message ID    : 	1b050792
  Length        : 	52
 2838 10/20/2002 20:22:42.390 SEV=8 IKEDBG/0 RPT=9197 171.69.89.78 
RECEIVED Message (msgid=1b050792) with payloads : 
HDR + HASH (8) + NONE (0)
total length : 48
2840 10/20/2002 20:22:42.390 SEV=9 IKEDBG/0 RPT=9198 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
processing hash
2841 10/20/2002 20:22:42.390 SEV=9 IKEDBG/0 RPT=9199 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
loading all IPSEC SAs
 2842 10/20/2002 20:22:42.390 SEV=9 IKEDBG/1 RPT=793 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Generating Quick Mode Key!
2843 10/20/2002 20:22:42.390 SEV=9 IKEDBG/1 RPT=794 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Generating Quick Mode Key!
2844 10/20/2002 20:22:42.400 SEV=4 IKE/173 RPT=41 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
NAT-Traversal successfully negotiated!
IPSec traffic will be encapsulated to pass through NAT devices.
2847 10/20/2002 20:22:42.400 SEV=7 IKEDBG/0 RPT=9200 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Loading host:
  Dst: 172.16.172.50
  Src: 40.1.1.2
2849 10/20/2002 20:22:42.400 SEV=4 IKE/49 RPT=63 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Security negotiation complete for User (vpnclient2)
Responder, Inbound SPI = 0x350f3cb1, Outbound SPI = 0xc74e30e5
2852 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/6 RPT=309 
IPSEC key message parse - msgtype 1, Len 704, vers 1, pid 00000000, seq 0, err 0
, type 2, mode 1, state 320, label 0, pad 0, spi c74e30e5, encrKeyLen 24, hashKe
yLen 16, ivlen 8, alg 2, hmacAlg 3, lifetype 0, lifetime1 21, lifetime2 0, dsId 
0
2856 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1137 
Processing KEY_ADD msg!
2857 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1138 
key_msghdr2secassoc(): Enter
2858 10/20/2002 20:22:42.400 SEV=7 IPSECDBG/1 RPT=1139 
No USER filter configured
2859 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1140 
KeyProcessAdd: Enter
2860 10/20/2002 20:22:42.400 SEV=8 IPSECDBG/1 RPT=1141 
KeyProcessAdd: Adding outbound SA
2861 10/20/2002 20:22:42.400 SEV=8 IPSECDBG/1 RPT=1142 
KeyProcessAdd: src 172.16.172.50 mask 0.0.0.0, DST 40.1.1.2 mask 0.0.0.0
2862 10/20/2002 20:22:42.400 SEV=8 IPSECDBG/1 RPT=1143 
KeyProcessAdd: FilterIpsecAddIkeSa success
2863 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/6 RPT=310 
IPSEC key message parse - msgtype 3, Len 376, vers 1, pid 00000000, seq 0, err 0
, type 2, mode 1, state 32, label 0, pad 0, spi 350f3cb1, encrKeyLen 24, hashKey
Len 16, ivlen 8, alg 2, hmacAlg 3, lifetype 0, lifetime1 21, lifetime2 0, dsId 0
2866 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1144 
Processing KEY_UPDATE MSG!
2867 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1145 
Update inbound SA addresses
2868 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1146 
key_msghdr2secassoc(): Enter
2869 10/20/2002 20:22:42.400 SEV=7 IPSECDBG/1 RPT=1147 
No USER filter configured
2870 10/20/2002 20:22:42.400 SEV=9 IPSECDBG/1 RPT=1148 
KeyProcessUpdate: Enter
2871 10/20/2002 20:22:42.400 SEV=8 IPSECDBG/1 RPT=1149 
KeyProcessUpdate: success
2872 10/20/2002 20:22:42.400 SEV=8 IKEDBG/7 RPT=63 
IKE got a KEY_ADD MSG for SA: SPI = 0xc74e30e5
2873 10/20/2002 20:22:42.400 SEV=8 IKEDBG/0 RPT=9201 
pitcher: rcv KEY_UPDATE, spi 0x350f3cb1
2874 10/20/2002 20:22:42.400 SEV=4 IKE/120 RPT=63 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
PHASE 2 COMPLETED (msgid=1b050792)
2875 10/20/2002 20:22:42.430 SEV=8 IKEDECODE/0 RPT=8191 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	C5 A0 F0 8B 69 60 D7 47 
  Responder Cookie(8): 	48 65 B1 6F 36 1F 9D 3A 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Quick Mode
  Flags         :	1   (ENCRYPT )
  Message ID    : 	cf9d1420
  Length        : 	52
2882 10/20/2002 20:22:42.430 SEV=8 IKEDBG/0 RPT=9202 171.69.89.78 
RECEIVED Message (msgid=cf9d1420) with payloads : 
HDR + HASH (8) + NONE (0)
total length : 48
2884 10/20/2002 20:22:42.430 SEV=9 IKEDBG/0 RPT=9203 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
processing hash
 
2885 10/20/2002 20:22:42.430 SEV=9 IKEDBG/0 RPT=9204 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
loading all IPSEC SAs
2886 10/20/2002 20:22:42.430 SEV=9 IKEDBG/1 RPT=795 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Generating Quick Mode Key!
2887 10/20/2002 20:22:42.440 SEV=9 IKEDBG/1 RPT=796 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Generating Quick Mode Key!
2888 10/20/2002 20:22:42.440 SEV=4 IKE/173 RPT=42 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
NAT-Traversal successfully negotiated!
IPSec traffic will be encapsulated to pass through NAT devices.
2891 10/20/2002 20:22:42.440 SEV=7 IKEDBG/0 RPT=9205 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Loading subnet:
  DST: 0.0.0.0  mask: 0.0.0.0
  Src: 40.1.1.2
2893 10/20/2002 20:22:42.440 SEV=4 IKE/49 RPT=64 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Security negotiation complete for User (vpnclient2)
Responder, Inbound SPI = 0x2a2e2dcd, Outbound SPI = 0xf1f4d328
2896 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/6 RPT=311 
IPSEC key message parse - msgtype 1, Len 704, vers 1, pid 00000000, seq 0, err 0
, type 2, mode 1, state 320, label 0, pad 0, spi f1f4d328, encrKeyLen 24, hashKe
yLen 16, ivlen 8, alg 2, hmacAlg 3, lifetype 0, lifetime1 21, lifetime2 0, dsId 
0
2900 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1150 
Processing KEY_ADD MSG!
2901 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1151 
key_msghdr2secassoc(): Enter
2902 10/20/2002 20:22:42.440 SEV=7 IPSECDBG/1 RPT=1152 
No USER filter configured
2903 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1153 
KeyProcessAdd: Enter
2904 10/20/2002 20:22:42.440 SEV=8 IPSECDBG/1 RPT=1154 
KeyProcessAdd: Adding outbound SA
2905 10/20/2002 20:22:42.440 SEV=8 IPSECDBG/1 RPT=1155 
KeyProcessAdd: src 0.0.0.0 mask 255.255.255.255, DST 40.1.1.2 mask 0.0.0.0
2906 10/20/2002 20:22:42.440 SEV=8 IPSECDBG/1 RPT=1156 
KeyProcessAdd: FilterIpsecAddIkeSa success
2907 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/6 RPT=312 
IPSEC key message parse - msgtype 3, Len 376, vers 1, pid 00000000, seq 0, err 0
, type 2, mode 1, state 32, label 0, pad 0, spi 2a2e2dcd, encrKeyLen 24, hashKey
Len 16, ivlen 8, alg 2, hmacAlg 3, lifetype 0, lifetime1 21, lifetime2 0, dsId 0
2910 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1157 
Processing KEY_UPDATE MSG!
2911 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1158 
Update inbound SA addresses
2912 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1159 
key_msghdr2secassoc(): Enter
2913 10/20/2002 20:22:42.440 SEV=7 IPSECDBG/1 RPT=1160 
No USER filter configured
2914 10/20/2002 20:22:42.440 SEV=9 IPSECDBG/1 RPT=1161 
KeyProcessUpdate: Enter
2915 10/20/2002 20:22:42.440 SEV=8 IPSECDBG/1 RPT=1162 
KeyProcessUpdate: success
2916 10/20/2002 20:22:42.440 SEV=8 IKEDBG/7 RPT=64 
IKE got a KEY_ADD MSG for SA: SPI = 0xf1f4d328
2917 10/20/2002 20:22:42.440 SEV=8 IKEDBG/0 RPT=9206 
pitcher: rcv KEY_UPDATE, spi 0x2a2e2dcd
2918 10/20/2002 20:22:42.440 SEV=4 IKE/120 RPT=64 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
PHASE 2 COMPLETED (msgid=cf9d1420)
2919 10/20/2002 20:22:44.680 SEV=7 IPSECDBG/1 RPT=1163 
IPSec Inbound SA has received data!
2920 10/20/2002 20:22:44.680 SEV=8 IKEDBG/0 RPT=9207 
pitcher: recv KEY_SA_ACTIVE spi 0x2a2e2dcd
2921 10/20/2002 20:22:44.680 SEV=8 IKEDBG/0 RPT=9208 
KEY_SA_ACTIVE no old rekey centry found with new spi 0x2a2e2dcd, mess_id 0x0
2922 10/20/2002 20:22:47.530 SEV=9 IPSECDBG/18 RPT=828 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2923 10/20/2002 20:22:47.530 SEV=9 IPSECDBG/18 RPT=829 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2924 10/20/2002 20:22:48.280 SEV=9 IPSECDBG/17 RPT=668 
Received an IPSEC-over-NAT-T NAT keepalive packet
2925 10/20/2002 20:22:52.390 SEV=9 IPSECDBG/17 RPT=669 
Received an IPSEC-over-NAT-T NAT keepalive packet
2926 10/20/2002 20:22:52.720 SEV=7 IPSECDBG/1 RPT=1164 
IPSec Inbound SA has received data!
2927 10/20/2002 20:22:52.720 SEV=8 IKEDBG/0 RPT=9209 
pitcher: recv KEY_SA_ACTIVE spi 0x19fb2d12
2928 10/20/2002 20:22:52.720 SEV=8 IKEDBG/0 RPT=9210 
KEY_SA_ACTIVE no old rekey centry found with new spi 0x19fb2d12, mess_id 0x0
2929 10/20/2002 20:22:56.530 SEV=9 IPSECDBG/18 RPT=830 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2930 10/20/2002 20:22:56.530 SEV=9 IPSECDBG/18 RPT=831 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2931 10/20/2002 20:22:58.300 SEV=8 IKEDECODE/0 RPT=8192 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	B6 92 24 F4 96 0A 2D 9E 
  Responder Cookie(8): 	76 FE F6 55 1F 9D 49 F3 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	d4a0ec25
  Length        : 	76
2938 10/20/2002 20:22:58.300 SEV=8 IKEDBG/0 RPT=9211 171.69.89.78 
RECEIVED Message (msgid=d4a0ec25) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
2940 10/20/2002 20:22:58.300 SEV=9 IKEDBG/0 RPT=9212 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
processing hash
2941 10/20/2002 20:22:58.300 SEV=9 IKEDBG/0 RPT=9213 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Processing Notify payload
2942 10/20/2002 20:22:58.300 SEV=8 IKEDECODE/0 RPT=8193 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	B6 92 24 F4 96 0A 2D 9E 76 FE F6 55 1F 9D 49 F3 
  Length        :	28
2948 10/20/2002 20:22:58.300 SEV=9 IKEDBG/41 RPT=336 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Received keep-alive of type Altiga keep-alive, not the negotiated type
2950 10/20/2002 20:22:58.310 SEV=8 IKEDECODE/0 RPT=8194 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	B6 92 24 F4 96 0A 2D 9E 
  Responder Cookie(8): 	76 FE F6 55 1F 9D 49 F3 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	d196c721
  Length        : 	84
2957 10/20/2002 20:22:58.310 SEV=8 IKEDBG/0 RPT=9214 171.69.89.78 
RECEIVED Message (msgid=d196c721) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 80
2959 10/20/2002 20:22:58.310 SEV=9 IKEDBG/0 RPT=9215 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
processing hash
2960 10/20/2002 20:22:58.310 SEV=9 IKEDBG/0 RPT=9216 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Processing Notify payload
2961 10/20/2002 20:22:58.310 SEV=8 IKEDECODE/0 RPT=8195 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	DPD R-U-THERE (36136)
  Spi           :	B6 92 24 F4 96 0A 2D 9E 76 FE F6 55 1F 9D 49 F3 
  Length        :	32
2967 10/20/2002 20:22:58.310 SEV=9 IKEDBG/36 RPT=92 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Sending keep-alive of type DPD R-U-THERE-ACK (seq number 0x2d932552)
2969 10/20/2002 20:22:58.310 SEV=9 IKEDBG/0 RPT=9217 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
constructing blank hash
2970 10/20/2002 20:22:58.310 SEV=9 IKEDBG/0 RPT=9218 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
constructing qm hash
2971 10/20/2002 20:22:58.310 SEV=8 IKEDBG/0 RPT=9219 171.69.89.78 
SENDING Message (msgid=d678099) with payloads : 
HDR + HASH (8) + NOTIFY (11) 
total length : 80
2973 10/20/2002 20:23:02.400 SEV=8 IKEDECODE/0 RPT=8196 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	C5 A0 F0 8B 69 60 D7 47 
  Responder Cookie(8): 	48 65 B1 6F 36 1F 9D 3A 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	317b646a
  Length        : 	76
2980 10/20/2002 20:23:02.400 SEV=8 IKEDBG/0 RPT=9220 171.69.89.78 
RECEIVED Message (msgid=317b646a) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
2982 10/20/2002 20:23:02.400 SEV=9 IKEDBG/0 RPT=9221 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
processing hash
2983 10/20/2002 20:23:02.400 SEV=9 IKEDBG/0 RPT=9222 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Processing Notify payload
2984 10/20/2002 20:23:02.400 SEV=8 IKEDECODE/0 RPT=8197 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	C5 A0 F0 8B 69 60 D7 47 48 65 B1 6F 36 1F 9D 3A 
  Length        :	28
2990 10/20/2002 20:23:02.400 SEV=9 IKEDBG/41 RPT=337 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Received keep-alive of type Altiga keep-alive, not the negotiated type
2992 10/20/2002 20:23:02.410 SEV=9 IPSECDBG/17 RPT=670 
Received an IPSEC-over-NAT-T NAT keepalive packet
2993 10/20/2002 20:23:05.530 SEV=9 IPSECDBG/18 RPT=832 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2994 10/20/2002 20:23:05.530 SEV=9 IPSECDBG/18 RPT=833 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2995 10/20/2002 20:23:08.310 SEV=9 IPSECDBG/17 RPT=671 
Received an IPSEC-over-NAT-T NAT keepalive packet
2996 10/20/2002 20:23:12.420 SEV=9 IPSECDBG/17 RPT=672 
Received an IPSEC-over-NAT-T NAT keepalive packet
2997 10/20/2002 20:23:14.530 SEV=9 IPSECDBG/18 RPT=834 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2998 10/20/2002 20:23:14.530 SEV=9 IPSECDBG/18 RPT=835 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
2999 10/20/2002 20:23:18.330 SEV=8 IKEDECODE/0 RPT=8198 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	B6 92 24 F4 96 0A 2D 9E 
  Responder Cookie(8): 	76 FE F6 55 1F 9D 49 F3 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	f6457474
  Length        : 	76
3006 10/20/2002 20:23:18.330 SEV=8 IKEDBG/0 RPT=9223 171.69.89.78 
RECEIVED Message (msgid=f6457474) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
3008 10/20/2002 20:23:18.330 SEV=9 IKEDBG/0 RPT=9224 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
processing hash
3009 10/20/2002 20:23:18.330 SEV=9 IKEDBG/0 RPT=9225 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Processing Notify payload
3010 10/20/2002 20:23:18.330 SEV=8 IKEDECODE/0 RPT=8199 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	B6 92 24 F4 96 0A 2D 9E 76 FE F6 55 1F 9D 49 F3 
  Length        :	28
3016 10/20/2002 20:23:18.330 SEV=9 IKEDBG/41 RPT=338 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Received keep-alive of type Altiga keep-alive, not the negotiated type
3018 10/20/2002 20:23:18.330 SEV=9 IPSECDBG/17 RPT=673 
Received an IPSEC-over-NAT-T NAT keepalive packet
3019 10/20/2002 20:23:22.430 SEV=8 IKEDECODE/0 RPT=8200 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	C5 A0 F0 8B 69 60 D7 47 
  Responder Cookie(8): 	48 65 B1 6F 36 1F 9D 3A 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	358ae39e
  Length        : 	76
3026 10/20/2002 20:23:22.430 SEV=8 IKEDBG/0 RPT=9226 171.69.89.78 
RECEIVED Message (msgid=358ae39e) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
3028 10/20/2002 20:23:22.430 SEV=9 IKEDBG/0 RPT=9227 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
processing hash
3029 10/20/2002 20:23:22.430 SEV=9 IKEDBG/0 RPT=9228 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Processing Notify payload
3030 10/20/2002 20:23:22.430 SEV=8 IKEDECODE/0 RPT=8201 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	C5 A0 F0 8B 69 60 D7 47 48 65 B1 6F 36 1F 9D 3A 
  Length        :	28
3036 10/20/2002 20:23:22.430 SEV=9 IKEDBG/41 RPT=339 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Received keep-alive of type Altiga keep-alive, not the negotiated type
3038 10/20/2002 20:23:22.430 SEV=9 IPSECDBG/17 RPT=674 
Received an IPSEC-over-NAT-T NAT keepalive packet
3039 10/20/2002 20:23:23.530 SEV=9 IPSECDBG/18 RPT=836 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3040 10/20/2002 20:23:23.530 SEV=9 IPSECDBG/18 RPT=837 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3041 10/20/2002 20:23:28.340 SEV=9 IPSECDBG/17 RPT=675 
Received an IPSEC-over-NAT-T NAT keepalive packet
3042 10/20/2002 20:23:32.440 SEV=9 IPSECDBG/17 RPT=676 
Received an IPSEC-over-NAT-T NAT keepalive packet
3043 10/20/2002 20:23:32.530 SEV=9 IPSECDBG/18 RPT=838 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3044 10/20/2002 20:23:32.530 SEV=9 IPSECDBG/18 RPT=839 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3045 10/20/2002 20:23:38.360 SEV=8 IKEDECODE/0 RPT=8202 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	B6 92 24 F4 96 0A 2D 9E 
  Responder Cookie(8): 	76 FE F6 55 1F 9D 49 F3 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	fa8597e6
  Length        : 	76
3052 10/20/2002 20:23:38.360 SEV=8 IKEDBG/0 RPT=9229 171.69.89.78 
RECEIVED Message (msgid=fa8597e6) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
3054 10/20/2002 20:23:38.360 SEV=9 IKEDBG/0 RPT=9230 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
processing hash
3055 10/20/2002 20:23:38.360 SEV=9 IKEDBG/0 RPT=9231 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Processing Notify payload
3056 10/20/2002 20:23:38.360 SEV=8 IKEDECODE/0 RPT=8203 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	B6 92 24 F4 96 0A 2D 9E 76 FE F6 55 1F 9D 49 F3 
  Length        :	28
3062 10/20/2002 20:23:38.360 SEV=9 IKEDBG/41 RPT=340 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Received keep-alive of type Altiga keep-alive, not the negotiated type
3064 10/20/2002 20:23:38.360 SEV=9 IPSECDBG/17 RPT=677 
Received an IPSEC-over-NAT-T NAT keepalive packet
3065 10/20/2002 20:23:41.530 SEV=9 IPSECDBG/18 RPT=840 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3066 10/20/2002 20:23:41.530 SEV=9 IPSECDBG/18 RPT=841 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3067 10/20/2002 20:23:42.470 SEV=8 IKEDECODE/0 RPT=8204 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	C5 A0 F0 8B 69 60 D7 47 
  Responder Cookie(8): 	48 65 B1 6F 36 1F 9D 3A 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
3073 10/20/2002 20:23:42.470 SEV=8 IKEDECODE/0 RPT=8204 171.69.89.78 
  Message ID    : 	c892dd4c
  Length        : 	76
RECEIVED Message (msgid=c892dd4c) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
3076 10/20/2002 20:23:42.470 SEV=9 IKEDBG/0 RPT=9233 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
processing hash
3077 10/20/2002 20:23:42.470 SEV=9 IKEDBG/0 RPT=9234 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Processing Notify payload
3078 10/20/2002 20:23:42.470 SEV=8 IKEDECODE/0 RPT=8205 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	C5 A0 F0 8B 69 60 D7 47 48 65 B1 6F 36 1F 9D 3A 
  Length        :	28
3084 10/20/2002 20:23:42.470 SEV=9 IKEDBG/41 RPT=341 171.69.89.78 
Group [ciscovpn] User [vpnclient2]
Received keep-alive of type Altiga keep-alive, not the negotiated type
3086 10/20/2002 20:23:42.470 SEV=9 IPSECDBG/17 RPT=678 
Received an IPSEC-over-NAT-T NAT keepalive packet
3087 10/20/2002 20:23:48.370 SEV=9 IPSECDBG/17 RPT=679 
Received an IPSEC-over-NAT-T NAT keepalive packet
3088 10/20/2002 20:23:50.530 SEV=9 IPSECDBG/18 RPT=842 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3089 10/20/2002 20:23:50.530 SEV=9 IPSECDBG/18 RPT=843 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3090 10/20/2002 20:23:52.470 SEV=9 IPSECDBG/17 RPT=680 
Received an IPSEC-over-NAT-T NAT keepalive packet
3091 10/20/2002 20:23:58.380 SEV=8 IKEDECODE/0 RPT=8206 171.69.89.78 
ISAKMP HEADER : 	( Version 1.0 )
  Initiator Cookie(8): 	B6 92 24 F4 96 0A 2D 9E 
  Responder Cookie(8): 	76 FE F6 55 1F 9D 49 F3 
  Next Payload  :	HASH (8)
  Exchange Type :	Oakley Informational
  Flags         :	1   (ENCRYPT )
  Message ID    : 	943c7d99
  Length        : 	76
3098 10/20/2002 20:23:58.390 SEV=8 IKEDBG/0 RPT=9235 171.69.89.78 
RECEIVED Message (msgid=943c7d99) with payloads : 
HDR + HASH (8) + NOTIFY (11) + NONE (0)
total length : 76
3100 10/20/2002 20:23:58.390 SEV=9 IKEDBG/0 RPT=9236 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
processing hash
3101 10/20/2002 20:23:58.390 SEV=9 IKEDBG/0 RPT=9237 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Processing Notify payload
3102 10/20/2002 20:23:58.390 SEV=8 IKEDECODE/0 RPT=8207 171.69.89.78 
Notify Payload Decode :
  DOI           :	IPSEC (1)
  Protocol      :	ISAKMP (1)
  Message       :	Altiga keep-alive (40500)
  Spi           :	B6 92 24 F4 96 0A 2D 9E 76 FE F6 55 1F 9D 49 F3 
  Length        :	28
3108 10/20/2002 20:23:58.390 SEV=9 IKEDBG/41 RPT=342 171.69.89.78 
Group [ciscovpn] User [vpnclient1]
Received keep-alive of type Altiga keep-alive, not the negotiated type
3110 10/20/2002 20:23:58.390 SEV=9 IPSECDBG/17 RPT=681 
Received an IPSEC-over-NAT-T NAT keepalive packet
3111 10/20/2002 20:23:59.530 SEV=9 IPSECDBG/18 RPT=844 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success
3112 10/20/2002 20:23:59.530 SEV=9 IPSECDBG/18 RPT=845 171.69.89.78 
Xmit IPSEC-over-UDP NAT keepalive packet: success

其他疑難排解

NAT-T使用埠4500將IPSec流量封裝在UDP資料包中。如果未在VPN集中器上檢查NAT-T，或未在VPN客戶端上檢查NAT透明度，則建立IPSec隧道；但是，您無法傳遞任何資料。要使NAT-T正常工作，您必須在集中器上檢查NAT-T，並在客戶端上檢查NAT透明度（通過UDP）。

以下示例展示了在集中器上未檢查NAT-T的情況。在客戶端上檢查了透明隧道。在這種情況下，會在客戶端和集中器之間建立IPSec隧道。但是，由於IPSec通道埠協商失敗，客戶端和集中器之間沒有資料傳遞。因此，遠端訪問會話的傳輸和接收位元組為零。

以下示例顯示了VPN客戶端的統計資訊。請注意，協商的隧道埠為0。有人嘗試從DOS提示符處ping 192.168.2.251（VPN 3000集中器的專用介面）和172.16.172.50。但是，這些ping操作會失敗，因為未協商任何隧道埠，因此IPSec資料在遠端VPN伺服器上被丟棄。

以下範例顯示VPN使用者端正在傳送加密資料（13個封包）。但是遠端VPN伺服器的解密資料包數為零，並且它尚未傳送回任何加密資料。由於未協商任何隧道埠，因此遠端VPN伺服器會丟棄資料包並且不傳送回複資料。