> Source: [sk103094](https://support.checkpoint.com/results/sk/sk103094)

# sk103094 - IPS protection "DNS Tunneling" is activated, but it does not generate any logs

| Property | Value |
|----------|-------|
| Solution ID | sk103094 |
| Date Created | 2014-10-25 |
| Last Modified | 2025-09-10 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- SmartView Tracker / SmartLog does not show any logs from IPS protection "DNS Tunneling", although the protection was configured to "Detect" or "Prevent" and generate a log.

## Cause

The IPS protection "DNS Tunneling" (which is applicable only to Security Gateway R77.30 and above) depends on a definition in the*$FWDIR/lib/traps.h* file on the Security Management Server / Domain Management Server.

In some upgrade scenarios to R77.30, the original *traps.h* file (the one before the upgrade) might not be replaced by the new *traps.h* file. This can happen, for example, when the original *traps.h* file was manually edited.

Since the *traps.h* file was not replaced during an upgrade, the required definition is missing. As a result, this IPS protection does not work as expected.

## Solution

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