> Source: [sk115360](https://support.checkpoint.com/results/sk/sk115360)

# sk115360 - Site to Site VPN tunnel fails to establish with the "certificate unavailable" error in the $FWDIR/log/ike.elg file

| Property | Value |
|----------|-------|
| Solution ID | sk115360 |
| Date Created | 2017-01-09 |
| Last Modified | 2025-01-22 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20, R81.10 (EOS), R81 (EOS) |

## Symptoms

- * Site to Site VPN tunnel fails to establish.
* The *$FWDIR/log/ike.elg* file on the Security Gateway contains the error "*certificate unavailable*".
* Resetting the SIC between the Security Gateway and the Management Server does not resolve the issue.

## Cause

Possible corruption in the certificate issued by the Internal CA for this Security Gateway.

## Solution

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

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