> Source: [sk184191](https://support.checkpoint.com/results/sk/sk184191)

# sk184191 - Spark Firewall experiences frequent network outages and freezes

| Property | Value |
|----------|-------|
| Solution ID | sk184191 |
| Date Created | 2025-10-22 |
| Last Modified | 2025-10-25 |
| Technical Level | General |
| Products | Spark Firewall (Locally Managed) |
| Versions | R81.10.X |
| Platform | 1570R, 1575R, 1500, 1900, 2000, 1600, 1800, 1595R |

## Symptoms

- * The appliance required frequent reboots to restore network connectivity.

* Both incoming and outgoing network traffic stopped, while management access through WebUI and SSH remained available.

* The appliance stopped responding, especially overnight.

* Logs did not update correctly or displayed incorrect information.

## Cause

A memory leak in SIP inspection caused the appliance to exhaust available memory over time. This led to network traffic outages and required frequent reboots to restore service.

## Solution

This problem was fixed. The fix is included starting from:

* [R81.10.17 Build 996004721](https://support.checkpoint.com/results/sk/sk183153)

Check Point recommends to always upgrade to the [Recommended version](https://support.checkpoint.com/results/sk/sk95746) ([Security Gateway](https://support.checkpoint.com/product/73) / [VSX](https://support.checkpoint.com/product/359) / [Security Management Server](https://support.checkpoint.com/product/184) / [Multi-Domain Security Management Server](https://support.checkpoint.com/product/166) / [SmartConsole](https://support.checkpoint.com/product/191)).

If you choose not to upgrade, [contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for your version.

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