If you are having error message “Secure VPN connection terminated by peer. Reason Reason 433: (reason not specified by peer)†lately and have Vista OS on your Lenovo Thinkpad T61 with Cisco VPN Client v.5.0.02.0090, well we have the fix.
First of all, try to ping the VPN client to find out whether the connection can be established or not. If it responded well, you should see the option to enable “Local Area Connection 2 (Cisco VPN System Adapter) in the Network Connection window. If it is disabled, the fingerprint might have conflict with the VPN.
Now that you know that the problem of Cisco VPN Client is caused by fingerprint reader software, you should get a compatible one. Start by uninstalling the Thinkavantage Fingerprint Reader driver and install the latest fingerprint reader software. Once you have installed the driver, the VPNClient should be able to connect.
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