VPN Error 721: The remote computer is not responding

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VPNs work by encrypting your Internet traffic, in that fashion it makes it impossible for your Cyberspace Service Provider (ISP), law enforcement agencies, and criminal hackers to rail your activities online. Additionally, the technology is fairly unproblematic to use, which is yet another reason for contributing to its ever-growing popularity. Today, information technology'south no longer a engineering used by companies.

VPNs can be fairly like shooting fish in a barrel to utilise, even and then you lot can meet challenging problems with it from fourth dimension to time, such equally setting up the VPN manually, or using the VPN software, and solving VPN Errors. While bug are leap to persist with VPNs, this article will help you troubleshoot i of the most common errors with VPN, which is Mistake 721.

Here, nosotros have a look at what VPN Error 721 is and how to troubleshoot it.

VPN Error 721 The remote estimator is non responding

VPN Fault 721 is a Microsoft error that arises after making a failed try to establish a Virtual Private Network (VPN) connexion to a corporate network by using a Betoken-to-Point Tunneling Protocol (PPTP) client. Sometimes this mistake may pop up after making a failed attempt to plant a dial-up connection afterwards upgrading your computer to Microsoft Windows XP from older versions.

The exact VPN error 721 descriptions may vary from 'Remote PPP peer is not responding' to 'The remote computer is not responding' to 'The remote figurer did not respond'.

What'due south Causing This Error?

This consequence may occur if the network firewall does not permit Generic Routing Encapsulation (GRE) protocol traffic. GRE is IP Protocol 47. PPTP uses GRE for tunneled data.

Signal-to-Indicate Tunneling Protocol uses Generic Routing Encapsulation (GRE) for tunneled data. VPN error 721 may occur if the network firewall does not let the GRE protocol traffic. The Generic Routing Encapsulation protocol is used forth with Signal-to-Betoken Tunneling Protocol to create virtual private networks between the server and the client or between the clients.

How to resolve it?

To resolve this error, you volition need to fulfill two conditions:

Configure the network firewall to permit GRE protocol 47
Ensure that the network firewall permits TCP traffic on port 1723.

Both of these conditions must be met to found VPN connectivity by using PPTP.

Additional Tips:

Deactivate your firewall awarding/security program on the system and test the VPN.
If using a wireless connexion, switch to using cablevision.
Close downward the VPN, run network diagnostics, make sure your internet connection is working, then turn the VPN on again.

Nosotros promise this guide facilitated you in resolving VPN error 721. Do permit us know if it worked.

Ankit Gupta is a author by profession and has more than seven years of global writing feel on technology and other areas. He follows technological developments and likes to write about Windows & IT security. He has a deep liking for wild life and has written a book on Top Tiger Parks of India.