# 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](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).

#### 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.