Are you getting the VPN Error 721? Today, in this TechSplat article provides a solution to the VPN error 721 that occurs when you try to establish a VPN connection through your Windows Server-based remote access server.
When you try to establish a virtual private network (VPN) connection to a corporate network using a Point to Point Tunneling Protocol (PPTP) client, the connection to the Microsoft Windows Server-based remote access server may fail. You may receive the following error message:
Error 721: The remote computer does not respond.
Note: The description of VPN error 721 may vary. However we have tried to narrow down the causes of VPN Error 721.
What Causes VPN Error 721
VPN 721 error is a Microsoft error that occurs after a failed attempt to establish a VPN connection to a corporate network using a PPTP (Point-to-Point Tunneling Protocol) client. This error sometimes occurs after a failed attempt to establish a dial-up connection after upgrading your computer from earlier versions to Microsoft Windows XP.
This problem can occur if the network firewall does not allow Generic Routing Encapsulation Protocol (GRE) traffic. GRE is an IP 47 protocol. PPTP uses GRE to tunnel data.
Point-to-point tunneling protocol uses Generic Routing Encapsulation (GRE) for tunnel data. A VPN 721 error can occur if the network firewall does not allow GRE traffic. GRE is used in conjunction with point-to-point tunneling to create virtual private networks between a server and a client or between clients.
How to fix VPN Error 721 – Remote Computer Does Not Respond
To fix VPN error 721, there are a wide-range of fixes that may help you get around this problem. Although not all of these fixes will help your case, it’s worth trying to ensure you’re checking all angles!
Use a Third-party repair tool
A third-party repair tool is a versatile tool that scans every corner of your PC and fixes the problem when an error is found. It recovers corrupted registry files, system files, driver problems, and more.
Remove recently added software and drivers to fix VPN Error 721
This problem occurs when other software or drivers start using the port required for a successful connection. To solve this problem, uninstall the software and drivers you just added and reboot the PC.
Removing Additional Devices
Additional devices such as Bluetooth, wireless keyboard and mouse, printer, game console, additional network devices can use the same port and cause a VPN or broadband connection error. You must remove these additional USB devices to restore your Internet connection.
Temporarily Disable the Firewall
A firewall is used to block malicious connections between your PC and the Internet. If you use a Windows firewall or third-party firewall, you should temporarily disable it and try to connect to the Internet.
Recover Registry File
If there is an invalid registry file entry or the registry file is corrupted, most applications will stop working properly. You must restore the registry file from a backup or fix the problem with a third-party recovery program.
Delete the modem configuration file and driver
Delete the previous modem configuration file using Control Panel -> Uninstall Program, then install a new copy of the modem driver. Also, uninstall the corrupt modem driver in the same way, then install the latest and most recent driver.
Update the Windows operating system and the installed driver
It is necessary to update the Windows operating system and the installed driver. Updating Windows with a driver fixes many problems and speeds up Windows.
Make sure that you have the correct recommendations
Make sure that you have the correct credentials and that your ISP account has not expired. Sometimes your ISP account may expire without your knowledge.
Check your cables, modem, and other hardware devices
Make sure your hardware configuration is correct. Check the cable connection to your PC, the status of your modem, and other hardware devices. A simple misconnected cable can prevent you from connecting to the Internet.
Conclusion on VPN Error 721
We hope that this guide has been able to help you with the VPN Error 721. Although this issue is quite tricky to get around, we hope that one of these fixes has helped you get VPN Error 721 away from your device.
If you’re wanting to find a VPN solution for you, why don’t you visit our partner site, AboutVPNs where you can find out more information about what and how VPNs work, as well as the best ones to use!