NAT unfold failure when Security Zone used in NAT rulebase

Product Security Gateways
Version R81.10 (EOS), R81.20, R82
OS Gaia
Last Modified 2025-06-15

Symptoms

• After enabling Security Zones in NAT rulebase, wrong IP address is shown in logs and NAT is performed incorrectly.
• Traffic that goes through the Anti-Spam blade gets its Source IP NATed. Although there is a NAT rule concerning this traffic, it says Source: Original.

Cause

When doing unfold, the Security Gateway was looking up the wrong connection in Security Zone flow.

Solution

This problem was fixed. The fix is included in:

• Jumbo Hotfix Accumulator for R82 starting from Take 25
• Jumbo Hotfix Accumulator for R81.20 starting from Take 101

If you choose not to upgrade, Check Point can supply a Hotfix. Contact Check Point Support to get a Hotfix for this issue.

A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.

For faster resolution and verification, please collect CPinfo files from the Security Management Server and Security Gateways involved in the case.

Hotfix installation instructions:

Refer to sk168597 - How to install a Hotfix.

NOTE

This solution has been verified for the specific scenario described by the combination of Product, Version, and Symptoms. It may not work in other scenarios.

Article Properties

Access Level General
Status Approved by TAC
Date Created 2025-01-30
Last Modified 2025-06-15