What is VPN Error 789 in Windows and How to fix it?

Most of us use VPNs to stay unidentified and protected while browsing the web. Although these programs are excellent, they have certain limitations. Very often, Internet users encounter various problems when trying to use this secure connection. Regardless of the operating system used, there is a high risk of encountering multiple VPN error codes. Today, the recognition error is VPN error 789.

The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer.

The 789 VPN error is one of the most common errors that occur when a user tries to connect to L2TP. Here, the L2TP connection attempt failed because the security layer encountered an initial negotiation of processing error with the remote computer.

One of the possible reasons for this error may be when you establish a client session by using Windows 2000 Terminal Services. Or when your system is not configured to connect properly to the L2TP server. Other possible causes are usually:

• The VPN client based on L2TP (or VPN server) is behind NAT.
• An incorrect certificate or pre-shared key is set on the VPN server or client
• The computer certificate or trusted root computer certificate is not present on the VPN server.
• The machine certificate on the VPN server does not have 'Server Authentication' as EKU.

All versions of the Windows operating system are all vulnerable to this VPN error. And most VPN users will encounter this problem, especially via Windows 7 L2TP IPSEC.

Lily: Troubleshooting and Solutions to Common VPN Error Codes.

How to correct VPN error 789

The 789 VPN error is one of the most common errors that occur when a user tries to connect to L2TP. You can choose one of the following options to resolve the VPN 789 error:

1. Restart your VPN adapter
2. Check the certificate
3. Reactivate the IPsec service

Let's take a look at each of these troubleshooting options in detail.

Option 1: Restart your VPN Network Adapter:

Before you start troubleshooting, try this simple trick. Restart your VPN and see if it works. here are the steps:

1) Right-click on 'Start & #39; and click on 'Device Manager"

2) Find 'Network Adapters'And click on the drop-down menu to expand the list.

3) Find your 'Network adapter"

4) Click on it with the right mouse button and select 'uninstall"

5) Now click on 'D & #39; agreement"

6)Restart & #39; your system

The device will reinstall the network card the next time you connect and should return to its factory default settings. If that does not solve the 789 VPN error problem, try the next option.

Option 2: Check the certificate:

Here, you will need to make sure that the correct certificate is used on both the client and the server. Similarly, if a pre-shared key (PSK) is used, verify that the same PSK key is configured on the client side and on the VPN server.

Option 3: Re-enable the IPsec service:

Here are the steps to reactivate the IPsec service:

1) Right-click on 'beginningAnd pressRun"

2) Type & #39;services.msc"

3) Search forIKE and AuthIP IPSec key modules& #39; and & #39;IPsec Policy Agent"

4) You will have to check the status of these two services. If this indicatesStarted & #39; click for & #39;Restart & #39;. Moreover, ifStarted & #39; the option is disabled,Enable & #39; he.

5) Double-click on both services and select "Startup type"

6) Change it toAutomatic & #39;

7) Click on 'D & #39; AGREEMENT & #39; Save Changes

8) NowRestart & #39; your VPN service and try to reconnect.

If the VPN 789 error persists even after trying all of the above options, you should immediately contact your VPN service provider. Let us know if any of these solutions fix Windows VPN error 789 by leaving a comment in the comments section below.