Office Office Exchange Server. Not an IT pro? Windows Server TechCenter. Sign in. United States English. Ask a question. Quick access. Search related threads. We are returned to the tab Security. Now we will click on the button [ IPSec Settings… ] and a new dialog will open. Tick the option User pre-shared key for authentication and enter the key in the field below it.
This will start the connection process. The first step is to enter the username and password. For security reasons, we should not to save the password. That will initiate the network connection process. During this process, we will see dialog on the screen with status messages. Those messages will change through the connection stages.
We will see two network icons in the notification area. We can click on the VPN connection and check its status. We will see the parameters in the new window. We should click the tab Details. Here we can see all parameters of the VPN connection. Some interesting parameters are authentication and encryption algorithms, internal IP address of the client and so on.
This algorithm is today considered too weak. Therefore, you have another reason to avoid using the Windows XP platform. The most vulnerable part here can be the IPSec pre-shared key, as all users on your system must share the same key.
The key should be very complex. However, if you need to share it with other people and give it to them in clear text, then sooner or later the secret key will be leaked. Like Like. If the VPN server accepts your name and password, the session setup completes. As a result, the L2TP layer doesn't see a response to its connection request.
There will be a long delay, typically 60 seconds, and then you may receive an error message that says there was no response from the server or there was no response from the modem or communication device. If you receive this error message before you receive the prompt for your name and password, IPSec didn't establish its session. If that occurs, examine your certificate or preshared key configuration, or send the isakmp log to your network administrator.
Many small networks use a router with NAT functionality to share a single Internet address among all the computers on the network. Home networks frequently use a NAT. For more information, see the "NAT Traversal" section. If the connection fails after you receive the prompt for your name and password, the IPSec session has been established and there's probably something wrong with your name and password.
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