Error 734 is a Point-to-Point Protocol error, usually associated with workstation connectivity to a internet provider or wide area network connection. The exact error message is "Error 734: The PPP link control protocol was terminated.".
Source of the problem
Error 734 is usually produced due to an error in authentication. Generally the username or password you are using to authenticate for the connection to initiate is incorrect.
Resolving the problem
- First and foremost, validate that the username and password you are using for the connection are correct. Most passwords are case sensitive, so you may way to re-enter your password and ensure that your caps-lock key is not active.
- If your username and password are correct, you may be passing on your windows domain credentials where you do not want to. Click your "Start" button, select "Connect To", and then click the connection you use for dial-up services. In the dialog that opens, click the "Properties" button. Now click on the "Options" tab. If the checkbox before "Include Windows logon domain" is checked, click it to uncheck it. Then click "OK". Test your PPP connection again.
- In some cases, you are using a secured password for authentication where the remote server does not permit it. To fix this click the "Start" button and select "Connect To". Now select your dial-up connection. In the "Connect" box that appears, click "Properties", then click on the "Security" tab. In the "Security Options" region under the "Validate my identity as follows" section check the "Allow unsecured password" checkbox if it is unchecked. Now click "OK". Retest your PPP connection.
- You may have multi-link negotiation turned on, but are using a single-link connection. To remedy this click "Start" and select "Settings". Now click "Network and Dial-up Connections". Right click your dial-up connection item, and then click "Properties". Click on the "Networking" tab, and select "Settings". If a check appears next to the "Negotiate multi-link for single link connections", click it to uncheck it. Click the "OK" button twice to finish. Test your connection again.
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