GRE tunnels fail after upgrade to R82 when SecureXL is enabled on the Security Gateway

Product: SecureXL
Version: R82
OS: Gaia
Last Modified: 2026-05-26

Symptoms

• After upgrading the Security Gateway to R82, Generic Routing Encapsulation (GRE) tunnels intermittently fail when SecureXL is enabled.
• Some DMZ-to-DMZ traffic also fails because of NAT inconsistencies.
• Packet captures on the Security Gateway show GRE traffic leaving the Gateway without NAT translation.
• Disabling SecureXL and restarting the Security Gateway restores tunnel connectivity.

Note: Disabling SecureXL can decrease performance and bypass acceleration features. Use only for temporary troubleshooting.

• Multiple locations are affected. The issue is not site-specific.

Cause

The Security Gateway does not use NAT for GRE traffic, even though NAT is configured for this traffic.

Solution

This problem was fixed. The fix is included in:

• Jumbo Hotfix Accumulator for R82 starting from Take 103

If you choose not to upgrade, 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 it.

For faster resolution and verification, collect these files:

1. CPinfo file from the Management Server involved in the case.
2. CPinfo file from the Security Gateway / each Cluster Member / Security Group 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.