> Source: [sk100194](https://support.checkpoint.com/results/sk/sk100194)

# sk100194 - TCPdump shows wrong IP addresses for NATed traffic when SecureXL is enabled

| Property | Value |
|----------|-------|
| Solution ID | sk100194 |
| Date Created | 2014-04-09 |
| Last Modified | 2019-05-21 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- TCPdump shows wrong IP addresses for NATed traffic when SecureXL is enabled:

* The incoming traffic is shown **after** the NAT
* The outgoing traffic, if it was Forwarded to Kernel (F2F) on the outbound, is shown **before** the NAT

## Cause

The issue is "cosmetic". When SecureXL is enabled and NAT is applied to traffic, TCPdump displays the internal information from Check Point kernel.

## Solution

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

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