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Windows 7 Uses Default Client and VPN Client for Dial-up. After dial-up Succeeds, Intranet cannot be Accessed

Publication Date:  2012-07-25 Views:  89 Downloads:  0
Issue Description
The Windows 7 uses the default client and VPN client for dial-up. After the dial-up succeeds, the intranet cannot be accessed.
Alarm Information
None.
Handling Process
Modify the registry:
1. Choose Start > Run. Enter regedit, and then click OK to enter the registry editor.
2. In the navigation tree on the left, choose My Computer > HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Services > Rasman > Parameters. In the right-hand pane, check whether the key value whose name is ProhibitIpSec and data type is DWORD exists. If no, right-click and choose New > DWORD Value from the shortcut menu. Then name the key value ProhibitIpSec. If yes, perform the following steps.
3. Select the key value and right-click. Select Modify to edit the value of DWORD. Enter 1 in Value Data. Then click OK.
4. Restart the PC to validate the modification.
Right-click Network Neighborhood. The following page is displayed:

Click New connection or network. The following page is displayed:

Select Connect to working area. The following page is displayed:

Select No. Create a new connection. The following page is displayed:

Select Use my Internet connection (VPN). The following page is displayed.

Fill in the address and name of the peer, and then click Next. The following page is displayed:

Fill in the user name and password, and then click Connect. The following page is displayed:

Click Cancel. The page of property of Network Neighborhood is returned, as shown in the following figure:

Click Change adapter, locate the L2TP dial-up that you create, and then right-click Properties. The following page is displayed.

Click Option. The following page is displayed.

Deselect Windows login domain, and then click Security. The following page is displayed:

Select L2TP/IPSec for the VPN type, and No encryption for the data encryption, and then click Advanced. The following page is displayed:
Deselect of Verify the name of the server certificate and Property, and click OK. The preceding page is returned. Then click Network. The following page is displayed:

Select IPv4, and then click Property. The following page is displayed.

Click Advanced. The dialog box on the right is displayed. Deselect Use the default gateway on the remote network. In this way, both the Internet and the intranet after the successful L2TP dial-up can be accessed. If Use the default gateway on the remote network is not deselected, only the L2TP VPN network can be accessed. Click OK. Open the page that is created, as shown in the following figure:

After the setting is complete, click Connect dial-up. The address is obtained.
Note: I use the Windows 7 OS. The dial-up succeeds only after I modify the registry, as shown in the following figure:

Then I delete the registry, and re-dial up after the PC is restarted. The dial-up succeeds, as shown in the following figure:

I re-install the Windows 7 OS of the Lenovo version. I do not modify the registry. The dial-up succeeds, as shown in the following figure:

I test in the Windows XP OS. I do not modify the registry, and the dial-up fails, as shown in the following figure:

In the Windows 7 OS, when the VPN client is adopted, the dial-up cannot be opened. The problem is solved when the VPN client runs in compatible mode. The following figure shows where to set the compatible mode:

Root Cause
The settings are incorrect.
Suggestions
In the Windows 7 OS, use the VPN client and dial up in compatible mode. Use the default dial-up in the Windows 7 OS without modifying the registry. If the dial-up fails, modify the registry. The dial-up still fails. Then delete the registry, and the dial-up succeeds. I once met such a customer who could not dial up without modifying the registry. After the registry was modify, the customer still failed to dial up. Then the customer deleted the registry, the dial-up succeeded and the access was normal. In the Windows XP OS, the dial-up succeeds only after the registry is modified. However, in the Windows 7 OS, you may do not need to modify the registry, or you need to delete the registry after it is modified.

END