> Source: [sk109838](https://support.checkpoint.com/results/sk/sk109838)

# sk109838 - Session Authentication fails for all connections when CoreXL is enabled on Security Gateway

| Property | Value |
|----------|-------|
| Solution ID | sk109838 |
| Date Created | 2016-01-27 |
| Last Modified | 2017-12-19 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * Session Authentication fails for all connections when CoreXL is enabled on Security Gateway.

* The *$FWDIR/log/asessiond.elg* file on Security Gateway repeatedly shows:  

  `sesauthd_invoke: Invalid kernel instance XXX`

## Cause

* The *in.asessiond* daemon (Session Authentication Security Server Agent) is not able to receive the required information from the FireWall kernel.
* Corruption of the *$FWDIR/conf/fwauth.NDB* file.

## Solution

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

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