> Source: [sk113401](https://support.checkpoint.com/results/sk/sk113401)

# sk113401 - Capsule VPN for Windows 10 failing to connect when using certificate

| Property | Value |
|----------|-------|
| Solution ID | sk113401 |
| Date Created | 2016-10-03 |
| Last Modified | 2018-06-20 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |

## Symptoms

- * Capsule VPN for Windows 10 failing to connect when using certificate.
* Error seen on Capsule Plug-in:"Authentication failed. Certificate authentication is not supported by this server. Contact the system administrator"  

  ![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk113401/sk113401_11610092358.png)
* Error seen on Capsule Plug-in:"Can't connect to x.x.x.x".
* *vpnd.elg* output:  
  "Certificate authentication is not enabled on the gateway object under the blade's authentication settings"  
  Or  
  "AuthenticationServices::CertAuthnRequestHandler auth Method = 3 , cert not allowed for SSL."

## Cause

In 'Policy \> Global Properties \> Remote Access \> SecureClient Mobile / SSL Network Extender': Authentication method is set to "Legacy". This does not allow certificate authentication.

![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk113401/sk113401_31610100001.png)

Authentication method should be changed to "Certificate" or "Mixed".

## Solution

This solution requires authentication. Please log in to view the full solution.

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