Most Common VPN Error Codes and Troubleshoot

Table of Contents

A Virtual Private Network or VPN is a technology that enables secure, anonymous internet browsing. VPN serves a purpose when we want to access restricted content from any location on Earth. In addition to allowing anonymous browsing, Top VPNs Provider also provides the most robust 256-bit AES encryption to safeguard your communication.

The setup and make use of a VPN can become challenging occasionally, of your level of tech expertise regardless. It can be difficult to fix some errors when setting up the VPN manually or with VPN software.

The List of Common VPN Error Codes and their troubleshoot manual are provided below.

Common Error Code in VPN's

  • VPN Error Code 800
  • VPN Error Code 609, 633
  • VPN Error Code 732, 734, 812
  • VPN Error Code 806
  • VPN Error Code 789, 835
  • VPN Error Code766
  • VPN Error Code 691
  • VPN Error Code 809
  • VPN Error Code 13806
  • VPN Error Code 13801
  • VPN Error Code 0x800704c9
  • VPN Error Code 0x80070040
  • VPN Error Code 0x800B0101
  • VPN Error Code 0x800B0109
  • VPN Error Code 0x800B010F
  • VPN Error Code 0x80092013
  • VPN Error Code 0x800704D4
  • VPN Error Code 0x80072746

Let’s go over each VPN error code in detail and offer some troubleshooting advice.

VPN Error Code 800

Description of the VPN Error Code 800: The attempted VPN tunnels failed, so no remote connection was made. It’s possible that the VPN server is down. The security parameters needed for IPsec negotiation might not exactly be properly configured if this connection is attempting to use an L2TP/ IPsec tunnel.

Cause of Error: The user’s setting of the VPN Tunnel type as Automatic, which prevents all tunnels from establishing the connection, is the key cause of this error.

Error 800 while troubleshooting a VPN

1. The user must set up the precise VPN Tunnel on the client side during the deployment process in order to fix this error.

In order to opt for the appropriate VPN tunnel, go to Network Connection> Select Your Connection, click the Right-Click button under Properties> Securities Tab then.

In this scenario, you may receive tunnel-specific errors like GRE blocked for PPTP, Certificate error for SSL and L2TP negotiation errors for MSTP if the tunnel is unable to establish the connection….

2. To fix this error, carry out the following operation.

(i) Verify the VPN server’s reachability (or else ping the server)

(ii) If you’re using PPTP, make sure Firewall does not block either the GRE Port (47 or the TCS 1723).

(iii) Check the following if you’re using L2TP

Whether the server and client sides have access to the correct pre-shared key and machine certificate.

Firewall is not blocking the L2TP port (UDP 1701).

(iv) Verify the following when using an IKEv2 VPN:

IKE ports (UDP 500 and UDP 4500) are not Firewall-blocked.

Both the server and client sides have access to the correct machine certificate.

Check whether the connect machine certificate is accessible on both the client and server sides if you’re using an SSTP VPN.

VPN Error Code 609, 633

Description of an error code

609: An incorrect device type was specified.

633: The modem (or other connecting device) is either already in use or improperly configured.

Cause of the Error: The system’s internal VPN configuration is the key reason for this error.

Error 609, 633 in the VPN troubleshooting process

For Windows 7: The Diagnose button would be available for the Error page’s “Miniport missing” problem if the VPN was manually created. Apply Fix This by clicking that button; the operational system will manage the challenge automatically.

For Windows Vista or XP: To resolve the problem, open the command prompt in and enter the following commands.

netcfg.exe -e -c -p -i (Miniport Name for various tunnels may be MS _ PPTP, MS-L2TP or MS-1SSTP)

RasMan (Remote Access Connection Manager) service can be stopped and started.

VPN Error Code 732, 734, 812

Description of an error code

732: The remote computer and your computer were unable to come to an understanding regarding PPP control protocols.

734: The PPP link-control protocol came to an end.

812: A policy set up on your RAS/ VPN server prevented the connection.

In particular, the connection profile’s authentication configuration might not match the authentication method the server uses to validate your username and password. Please inform the RAS server administrator of this error by getting in touch with them.

Cause of the Error: The user may encounter this error when configuring a VPN if the VPN client is Windows Vista, Windows 7 or Windows 10 and the authentication protocol is MS-CHAP.

Troubleshooting VPN Error 732, 734, 812: Configure the VPN server with secure authentication protocols highly, such as EAP-based or MS-CHAPv2 authentication.

VPN Error Code 806

Error Code Description: Your computer’s connection to the VPN server was not successful. The most frequent reason for this failure is that Generic Routing Encapsulation (GRE) protocol packets cannot be allowed by at least one Internet device, such as a router or firewall, connecting your computer to the VPN server. Contact your network administrator or ISP (Internet Service Provider) if the issue still exists.

The Firewall blocks the GRE Protocol between the Server and Client, which is the key cause of the error.

Error Code 806 for VPN troubleshooting

  • Allow incoming and outgoing GRE Protocol (47) through your firewall system.
  • Set up the SSTP-based VPN tunnel in order that it connects to Firewall, NAT and Web Proxies on both the server and client sides.

VPN Error Code 789, 835

Description of an error code

789: During the initial negotiations with the remote computer, the security layer ran into a processing error, which caused the L2TP connection attempt to fail.

835: The security layer was unable to authenticate the remote computer, the L2TP connection attempt was unsuccessful. This could possibly be the case if a field or fields on the remote server’s certificate could not be verified as being relevant to the intended destination.

Cause of the Error: The error’s primary cause is when the L2TP/ IPSec connection IPSEC negotiation fails.

NAT is supported by an L2TP-based VPN server or client.

Pre-shared key and certificate key do not match.

The VPN Server does not support machine certificates or trusted root certificates.

According to the SKU, the machine certificate on the VPN server lacks “Server Authentication.”

Troubleshooting VPN Error 789, 835

  • During the connection, use the correct certificate key and pre-shared key.
  • The VPN server’s trusted machine certificate.

VPN Error Code 766

Error Code Description: There was no certificate to be found. A machine certificate, also referred to as a “computer certificate,” must be installed in connections that use the L2TP protocol over IPSec.

Cause of the Error: This error will happen if the client’s machine does not have a valid machine certificate.

Troubleshooting VPN Error 766: Using a valid machine certificate on the client’s machine is necessary to resolve the VPN error 766.

VPN Error Code 691

Error Code Description: The password and username combo you provided are not recognized, or the remote access server does not support the chosen authentication protocol, which results in a remote connection being denied.

Error Cause: This error typically happens when the user enters the wrong credentials.

VPN Error 691: Troubleshooting

  • Make sure to enter the right credentials to correct this error.
  • Contact your VPN provider to get a new password in case you forget your old one.
  • If the system is not accepting the “Caps Lock” key, make sure you turn it on or off while providing the credentials.

VPN Error Code 809

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Because the remote server is not responding, it is impossible to establish a network connection between your computer and the VPN server. This could possibly be the result of a network component (such as routers, NAT or firewalls). VPN connections are not permitted between your computer and the remote server. To find out which device may be the issue, please get in touch with your administrator or service provider.

The Firewall blocks the VPN ports that connect the Client and Server, which is the common cause of the error. The PPTP port (1723), L2TP, or IKEv2 port (UDP port 500, UDP port 451) may have been blocked by the firewall.

Error 809 in the VPN troubleshooting process:

Open the connections for the PPTP port (1723), L2TP, or IKEv2 port (UDP 500, UDP port 485) from your firewall.

Alternatively, avoid using firewalls to block ports for NAT, proxy or VPN connections by using the SSTP VPN Tunnel.

VPN Error Code 13806

Error Code Description: IKE was unable to locate a valid machine certificate, according to the error code description. To install a legitimate certificate in the proper Certificate Store, get in touch with your Network Security Administrator.

Cause of Error: You might receive this error if the VPN server does not have the machine certificate available.

Troubleshooting VPN Error 13806: Add the appropriate machine certificate to the VPN Server to resolve VPN Error 13806. To resolve the problem, get in touch with your VPN provider if you do not have the machine certificate.

VPN Error Code 13801

IKE authentication credentials are not acceptable, according to the error code description.

The list of potential causes for this error is provided below.

The RAS server’s machine certificate has expired.

As opposed to the EKU (Enhanced Key Usage), the machine certificate used for IKEv2 validation on the RAS Server lacks “Server Authentication.”

The client-side root certificate that verifies the RAS server certificate is not available.

The subject name of the server certificate and the client’s VPN server name are not the same.

Troubleshooting VPN Error 13801: Your VPN provider is the only one who can fix this error; get in touch with them to discuss your problem. Properties.

VPN Error Code 0x800704C9

The user may receive this error if the server’s SSTP ports are missing.

Implement the steps below to check that the RAS Server has enough ports set up for remote access. This should resolve the VPN error 0x800704C9.

Utilize the MMC snap-in to begin routing and remote access.

To expand the server, press the+ button.

Right-click on Ports, then select Properties.

• Choose WAN Miniport (SSTP) from the list of names, then click Configure.

• Click the Ok button after changing the numbers in the Maximum ports list to suit your needs.

Click Ok from the dialog box next to Port Properties.

VPN Error Code 0x80070040

Cause of the Error: This error occurs when the RAS server’s “Server Authentication Certificate” is not installed.

Enable the “Server Authentication Certificate” on the RAS Server to fix the VPN Error 0x80070040.

VPN Error Code 0x800B0101

When checking against the current system clock or the timestamp in the signed file, a required certificate is not valid.

The “Server Authentication Certificate” is not installed on the Routing and Remote Access server, which causes the error.

Enable the Server Authentication Certificate on both the routing and remote access servers, according to the troubleshooting VPN error 0x800B0101.

VPN Error Code 0x800B0109

Error Code Description: A chain of processed certificates that ends in a root certificate that the trusted provider does not trust.

Cause of the Error: The trusted root qualification authority (CA) certificate is missing from the client’s computer.

Troubleshooting VPN Error 0x800B0109: Open the client computer’s Trusted Root Certificate Authority store to find the missing certificate.

VPN Error Code 0x800B010F

The certificate’s CN name does not match the past value, according to the error code description.

The error will appear if the subject name of the specified SSL Certificate and the server’s hostname, which was specified on the VPN connection, do not match.

Verify that the RAS Server being used for the SSL has the correct subject name when troubleshooting a VPN error 0x800B010F. The SSL Certificate must contain the same FQDN in the subject name if the client is configured to utilize it when connecting to a VPN server. You must install a new certificate on the RAS Server if the one with the precise subject name is not available.

VPN Error Code 0x80092013

Error Code Description: Because the revocation server was not operational, the function could not check revoke.

Cause of the Error: This error occurs when the client’s computer is unable to process the SSL Certificate obtained from the VPN Server by performing “Certificate Revocation checking.”

Troubleshooting VPN Error 0x80092013: Before connecting to the VPN tunnel, check to see if the server hosting the CRL (Certificate Revocation List) is accessible from the client side. The client must have access to the CRL server in order for the client’s computer to run the CRRL check while setting up the SSL Connection (HTTPS) and send a direct response.

VPN Error Code 0x800704D4

Error Code Description: The local system terminated the network connection.

The error is caused when the forward proxy in front of the VPN client fails to resolve the hostname to the server.

Check the proxy settings in Internet Explorer to resolve the VPN error 0x800704D4. Try to re-connect to the website you were visiting if it is ideal. You must get in touch with your network administrator to fix the situation if you are still having trouble. This error can be fixed automatically and is only non-permanent typically.

VPN Error Code 0x80072746

Error Code Description: The remote host forcibly shut down an active connection.

The server causes The error machine certificate not being installed on the VPN server.

Troubleshooting VPN Error 0x80072746: The only way to resolve this error is to get in touch with your network administrator to determine if the VPN Server has the correct server machine certificate installed. Try running the following command from the “netsh http show ssl” command prompt on your VPN server if it is properly installed.

Conclusion

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