> Source: [sk184007](https://support.checkpoint.com/results/sk/sk184007)

# sk184007 - GRE tunnels fail after upgrade to R82 when SecureXL is enabled on the Security Gateway

| Property | Value |
|----------|-------|
| Solution ID | sk184007 |
| Date Created | 2025-09-19 |
| Last Modified | 2026-05-26 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82 |
| OS | Gaia |

## 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](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82/Default.htm) starting from Take 103

If you choose not to upgrade, [Contact Check Point Support](https://www.checkpoint.com/support-services/contact-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](https://support.checkpoint.com/results/sk/sk92739) file from the Management Server involved in the case.
2. [CPinfo](https://support.checkpoint.com/results/sk/sk92739) 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](https://support.checkpoint.com/results/sk/sk168597).

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