> Source: [sk178386](https://support.checkpoint.com/results/sk/sk178386)

# sk178386 - Users cannot submit data to ELSTER (German tax authority) when HTTPS Inspection is enabled

| Property | Value |
|----------|-------|
| Solution ID | sk178386 |
| Date Created | 2022-03-17 |
| Last Modified | 2022-03-24 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R81.10 (EOS), R81 (EOS) |
| OS | Gaia |

## Symptoms

- * Users cannot submit data to ELSTER (German tax authority) when HTTPS inspection is enabled.
* The issue can occur when HTTPS Inspection bypass for the URL Category "Financial Services" is configured.
* In most cases, no log appears for the connection to ELSTER.

## Cause

The ELSTER server requires Client Certificate authentication, which is not supported with HTTPS Inspection.  

An HTTPS Inspection Bypass for websites that require Client Certificate authentication must be configured with **Source** , **Destination** , and **Service** , and not with **Category/Custom Application**.

## Solution

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

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