我刚刚使用 AT&T 的 Datapro 4GB 套餐，将我的 Snow Leopard Macbook Pro 与我的 iPhone 3GS 进行了 iPhone 网络共享。当我尝试使用 Cisco VPNClient 4.9.01 (0100) 从 Macbook Pro 连接到我的公司 VPN 时，我收到以下日志信息：
Cisco Systems VPN Client Version 4.9.01 (0100)
Copyright (C) 1998-2006 Cisco Systems, Inc. All Rights Reserved.
Client Type(s): Mac OS X
Running on: Darwin 10.6.0 Darwin Kernel Version 10.6.0: Wed Nov 10 18:13:17 PST 2010; root:xnu-1504.9.26~3/RELEASE_I386 i386
Config file directory: /etc/opt/cisco-vpnclient
1 13:02:50.791 02/22/2011 Sev=Info/4 CM/0x43100002
Begin connection process
2 13:02:50.791 02/22/2011 Sev=Warning/2 CVPND/0x83400011
Error -28 sending packet. Dst Addr: 0x0AD337FF, Src Addr: 0x0AD33702 (DRVIFACE:1158).
3 13:02:50.791 02/22/2011 Sev=Warning/2 CVPND/0x83400011
Error -28 sending packet. Dst Addr: 0x0A2581FF, Src Addr: 0x0A258102 (DRVIFACE:1158).
4 13:02:50.792 02/22/2011 Sev=Info/4 CM/0x43100004
Establish secure connection using Ethernet
5 13:02:50.792 02/22/2011 Sev=Info/4 CM/0x43100024
Attempt connection with server "209.235.253.115"
6 13:02:50.792 02/22/2011 Sev=Info/4 CVPND/0x43400019
Privilege Separation: binding to port: (500).
7 13:02:50.793 02/22/2011 Sev=Info/4 CVPND/0x43400019
Privilege Separation: binding to port: (4500).
8 13:02:50.793 02/22/2011 Sev=Info/6 IKE/0x4300003B
Attempting to establish a connection with 209.235.253.115.
9 13:02:51.293 02/22/2011 Sev=Warning/2 CVPND/0x83400018
Output size mismatch. Actual: 0, Expected: 237. (DRVIFACE:1319)
10 13:02:51.894 02/22/2011 Sev=Warning/2 CVPND/0x83400018
Output size mismatch. Actual: 0, Expected: 237. (DRVIFACE:1319)
11 13:02:52.495 02/22/2011 Sev=Warning/2 CVPND/0x83400018
Output size mismatch. Actual: 0, Expected: 237. (DRVIFACE:1319)
12 13:02:53.096 02/22/2011 Sev=Warning/2 CVPND/0x83400018
Output size mismatch. Actual: 0, Expected: 237. (DRVIFACE:1319)
13 13:02:53.698 02/22/2011 Sev=Warning/2 CVPND/0x83400018
Output size mismatch. Actual: 0, Expected: 237. (DRVIFACE:1319)
14 13:02:54.299 02/22/2011 Sev=Warning/2 CVPND/0x83400018
Output size mismatch. Actual: 0, Expected: 237. (DRVIFACE:1319)
15 13:02:54.299 02/22/2011 Sev=Info/4 IKE/0x43000075
Unable to acquire local IP address after 5 attempts (over 5 seconds), probably due to network socket failure.
16 13:02:54.299 02/22/2011 Sev=Warning/2 IKE/0xC300009A
Failed to set up connection data
17 13:02:54.299 02/22/2011 Sev=Info/4 CM/0x4310001C
Unable to contact server "209.235.253.115"
18 13:02:54.299 02/22/2011 Sev=Info/5 CM/0x43100025
Initializing CVPNDrv
19 13:02:54.300 02/22/2011 Sev=Info/4 CVPND/0x4340001F
Privilege Separation: restoring MTU on primary interface.
20 13:02:54.300 02/22/2011 Sev=Info/4 IKE/0x43000001
IKE received signal to terminate VPN connection
21 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x43700008
IPSec driver successfully started
22 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x43700014
Deleted all keys
23 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x4370000D
Key(s) deleted by Interface (192.168.0.171)
24 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x43700014
Deleted all keys
25 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x43700014
Deleted all keys
26 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x43700014
Deleted all keys
27 13:02:54.300 02/22/2011 Sev=Info/4 IPSEC/0x4370000A
IPSec driver successfully stopped
关键的是第 15 行：
15 13:02:54.299 02/22/2011 Sev=Info/4 IKE/0x43000075
Unable to acquire local IP address after 5 attempts (over 5 seconds), probably due to network socket failure.
我在网上找不到任何关于此问题的信息。我在 Google 上找到了一条错误消息，但那是一个瑞典语（或其他北欧语言网站）的网站，没有回答这个问题。
我尝试通过 USB 和蓝牙网络共享连接到 iPhone，它们都返回完全相同的结果。
我无法直接控制防火墙，但如果需要进行更改才能使其正常工作，我可能会让当权者进行调整。当然，不需要重新配置防火墙的解决方案会更好……
有谁知道我该怎么做才能实现这一点？
答案1
您是否已与 AT&T 核实，确保您的 DataPro 计划允许 VPN 连接，或者是否有任何端口被阻止？根据您的日志，似乎虽然您可以连接到 VPN 服务器，但有某种东西阻止了握手数据包通过管道传给您。
答案2
昨天我升级到了最新的 iOS 版本，其中包括个人热点设置，今天我可以通过我的 Cisco VPNClient 顺利连接。通过我的手机登录到我的远程服务器并回答这个问题。
欢迎来到未来！:)