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VPN clients Users can connect but cannot authenticate

1. Verify that both the remote access client and server in conjunction with a remote access policy are enabled to use at least one common authentication method and at least one common encryption method.
2. If you are using MS-CHAP, verify that you are not using a user password over 14 characters long. If so, either use a different authentication protocol or change the password so that it is 14 characters or less in length.
3. If you are using Windows authentication for a remote access server, verify that the remote access server computer account is a member of the RAS and IAS Servers security group. You can use the

netsh ras show registeredserver

command prompt to view the current registration. If your server is not registered, use the

netsh ras add registeredserver

command to register the server in a specified domain.

4. If you are using RADIUS authentication for a remote access server, verify that the IAS server computer account is a member of the RAS and IAS Servers security group. You can use the

netsh ras show registeredserver

command to view the current registration. If your server is not registered, use the

netsh ras add registeredserver

command to register the server in a specified domain.

5. If you are using RADIUS authentication, verify that the remote access server computer can communicate with the RADIUS server.

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