How do I fix Connection failed with error 720?


  1. Click Start, point to Settings, click Control Panel, and then double-click Network.
  2. Click TCP/IP that is bound to the dial-up adapter, and then click Remove.
  3. This removes the TCP/IP protocol and the Client for Microsoft Networks (if this feature has been installed).
  4. Restart your computer.

How do I fix Error 678 on my modem?

Make sure the NIC appears in the Network Connections Window as a local area connection and is enabled. Ensure that TCP/IP is bound to the device….Try the following:

  1. Check the phone cord between modem and wall jack.
  2. Ensure filters are installed at proper locations.
  3. Check for Electro-Magnetic Interference.

What is Error 651 in Internet connection?

Causes of a Connection Failed With Error 651 Error Error 651 indicates that an attempt at a connection to the internet was unsuccessful, or an existing connection has been terminated.

How do I fix Error 628?

Error 628 – connection terminated by the remote computer before it could be connected

  1. Connect the modem to your device.
  2. Press Windows + X, click on Device Manager.
  3. Right click on the modem device and select Uninstall.
  4. Now restart the device and let it install the modem drivers.

How do I fix VPN connection problems?

Here are the fixes that will help you resolve all the VPN issues:

  1. Clear your device from the previous VPN software:
  2. Switch the VPN Server:
  3. Check the firewall:
  4. Check if the VPN is compatible with site or service:
  5. Try utilising a different VPN Protocol:
  6. Get help from the help feature:
  7. Try the OpenVPN protocol:

Can’t connect to server through VPN?

When your VPN won’t connect, try these solutions:

  • Check your internet connection.
  • Check your login credentials.
  • Change the VPN server connection.
  • Restart the VPN software or browser plug-in.
  • Check that your VPN software is up-to-date.
  • Check that your browser is up-to-date.
  • Reinstall the latest VPN software package.

How do I fix my Tenda wifi router?

You can try solutions as below.

  1. Power cycle your modem and the Tenda device.
  2. Change the LAN IP address in the setup page.
  3. Clone the MAC address.
  4. Change the DNS Address.
  5. Change the MTU value.
  6. Change the WAN speed in setup page.
  7. Reset the Tenda device to factory default.
  8. Upgrade to a newer firmware.