我正在尝试通过 DSL 互联网连接到我公司的 Cisco IPSEC VPN。我成功地使用 Cisco VPN 客户端连接，现在由于许可问题，我正尝试切换到 OSX 10.6 本机客户端。
问题是连接失败并出现一个包含以下消息的对话框：
The negotiation with the VPN server failed. Verify the server address and try reconnecting.
我检查了日志：
Jun 29 13:10:39 racoon[4551]: Connecting.
Jun 29 13:10:39 racoon[4551]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 1).
Jun 29 13:10:39 racoon[4551]: IKEv1 Phase1 AUTH: success. (Initiator, Aggressive-Mode Message 2).
Jun 29 13:10:39 racoon[4551]: IKE Packet: receive success. (Initiator, Aggressive-Mode message 2).
Jun 29 13:10:39 racoon[4551]: IKEv1 Phase1 Initiator: success. (Initiator, Aggressive-Mode).
Jun 29 13:10:39 racoon[4551]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 3).
Jun 29 13:10:42 racoon[4551]: IKE Packet: transmit success. (Mode-Config message).
Jun 29 13:10:42 racoon[4551]: IKEv1 XAUTH: success. (XAUTH Status is OK).
Jun 29 13:10:42 racoon[4551]: IKE Packet: transmit success. (Mode-Config message).
Jun 29 13:10:42 racoon[4551]: IKEv1 Config: retransmited. (Mode-Config retransmit).
Jun 29 13:10:42 racoon[4551]: IKE Packet: receive success. (MODE-Config).
Jun 29 13:10:42 configd[19]: event_callback: Address added. previous interface setting (name: en1, address: 192.168.1.107), current interface setting (name: u92.168.54.147, subnet: 255.255.255.0, destination: 192.168.54.147).
Jun 29 13:10:42 configd[19]: network configuration changed.
Jun 29 13:10:42 vmnet-bridge[111]: Dynamic store changed
Jun 29 13:10:42 named[62]: not listening on any interfaces
Jun 29 13:10:58: --- last message repeated 1 time ---
Jun 29 13:10:58 configd[19]: SCNCController: Disconnecting. (Connection tried to negotiate for, 16 seconds).
Jun 29 13:10:58 racoon[4551]: IKE Packet: transmit success. (Information message).
Jun 29 13:10:58 racoon[4551]: IKEv1 Information-Notice: transmit success. (Delete ISAKMP-SA).
Jun 29 13:10:58 racoon[4551]: Disconnecting. (Connection tried to negotiate for, 19.113382 seconds).
Jun 29 13:10:58 named[62]: not listening on any interfaces
Jun 29 13:10:58 vmnet-bridge[111]: Dynamic store changed
Jun 29 13:10:58 named[62]: not listening on any interfaces
Jun 29 13:10:58 configd[19]: network configuration changed.
然后我打开终端，开始对 VPN 后面的服务器进行 ping，然后尝试再次连接。现在连接正常！本次记录：
Jun 29 13:46:53 racoon[8136]: Connecting.
Jun 29 13:46:53 racoon[8136]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 1).
Jun 29 13:46:53 racoon[8136]: IKEv1 Phase1 AUTH: success. (Initiator, Aggressive-Mode Message 2).
Jun 29 13:46:53 racoon[8136]: IKE Packet: receive success. (Initiator, Aggressive-Mode message 2).
Jun 29 13:46:53 racoon[8136]: IKEv1 Phase1 Initiator: success. (Initiator, Aggressive-Mode).
Jun 29 13:46:53 racoon[8136]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 3).
Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Mode-Config message).
Jun 29 13:46:56 racoon[8136]: IKEv1 XAUTH: success. (XAUTH Status is OK).
Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Mode-Config message).
Jun 29 13:46:56 racoon[8136]: IKEv1 Config: retransmited. (Mode-Config retransmit).
Jun 29 13:46:56 racoon[8136]: IKE Packet: receive success. (MODE-Config).
Jun 29 13:46:56 configd[19]: event_callback: Address added. previous interface setting (name: en1, address: 192.168.1.107), current interface settinaddress: 192.168.54.149, subnet: 255.255.255.0, destination: 192.168.54.149).
Jun 29 13:46:56 vmnet-bridge[111]: Dynamic store changed
Jun 29 13:46:56 named[62]: not listening on any interfaces
Jun 29 13:46:56 configd[19]: network configuration changed.
Jun 29 13:46:56 named[62]: not listening on any interfaces
Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Initiator, Quick-Mode message 1).
Jun 29 13:46:56 racoon[8136]: IKE Packet: receive success. (Initiator, Quick-Mode message 2).
Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Initiator, Quick-Mode message 3).
Jun 29 13:46:56 racoon[8136]: IKEv1 Phase2 Initiator: success. (Initiator, Quick-Mode).
Jun 29 13:46:56 racoon[8136]: Connected.
Jun 29 13:46:56 configd[19]: SCNCController: Connected.
我测试了几次，它的表现始终一样。有什么魔法呢？
答案1
在 OSX 10.7 中没有发现此问题，因此如果有人遇到此问题 — — 只需更新到 Lion 即可：)