Error 734 – The PPP Link Control Protocol Was Terminated

Error 734 is an error that comes up when using Point-to-Point Protocol. It is frequently linked with workstation connection with a wide region network connection or an Internet provider.

This error can also take place when the Security tab, which is located in Windows NT’s dial-up networking Modem Properties, is programmed to send encrypted passwords and the Internet service provider does not recognize these passwords.

The precise error message is usually “Error 734 – The PPP link control protocol was terminated”.

The Cause of the Problem

Error 734 usually occurs because there is an error in verification. Normally, the Password or Username used to verify the initiation of the connection is incorrect.

How to Solve the Problem

Here are some solutions that might help you in solving Error 734:

  1. You need to validate if the Password and Username you are using is correct. Some log-ins are case-sensitive, which means that you need to check and make sure that the caps-lock key is not on.
  2. If you have a correct Password and Username, you could be conveying Windows domain certificates to sites where you do not want to go to. You can avoid this by performing the following steps:
    • Click the Start button on your computer.
    • Select the Connect To key.
    • Go to the connection used for dial-up services.
    • Click Properties.
    • Hit the Options tab.
    • Uncheck, if the Include Windows log-on domain checkbox is checked.
    • Click OK.

  3. When a secured password is in use for authentication but the remote server does not permit it to function, do the following steps to fix it:
    • Go to the Start menu.
    • Click Connect To.
    • Hit the connection used for dial-up services.
    • In the appearing Connect dialog box, Select Properties.
    • Select the Security tab.
    • In the Security section under the Validate my identity as follows, Click Allow unsecured password.
    • Click OK.

  4. When using a single-link connection but a multi-link negotiation is turned on, do the following steps:
    • Go to the Start menu.
    • Click Settings.
    • Select Network and Dial-up Connections.
    • Right click the dial-up connection button, then hit Properties.
    • Push the Networking tab then select Settings.
    • If there is a check mark on the Negotiate multi-link for single link connections, hit it to uncheck it.
    • To finish, push the OK button twice.
    • Test connection again to find out the right configuration.