> Source: [sk184901](https://support.checkpoint.com/results/sk/sk184901)

# sk184901 - Kernel Parameters Set On-the-Fly are "Forgotten"

| Property | Value |
|----------|-------|
| Solution ID | sk184901 |
| Date Created | 2026-04-21 |
| Last Modified | 2026-04-23 |
| Technical Level | Advanced |
| Products | Security Gateway, Scalable Platforms |
| Versions | R82.10, R82, R81.20, R81.10 (EOS), R82.10, R82 |
| OS | Gaia |
| Platform | Open Server |

## Symptoms

- * Kernel parameters set on-the-fly using the `fw ctl set int` command revert to their original configuration.
* In VSX environments, some Virtual Systems retain the configuration, while others revert.
* The issue occurs even though the parameter is configured permanently in `$FWDIR/boot/modules/fwkern.conf`
* Parameters set in `$FWDIR/boot/modules/fwkern.conf` are missing from `$FWDIR/boot/modules/copy_fwkern.conf`

## Cause

Configuring kernel parameters on-the-fly using the `fw ctl set int` command are intended for short?term troubleshooting only. A reboot is required to ensure that kernel parameter changes are properly applied and remain persistent.  
During system boot, the system copies kernel parameter values from `fwkern.conf` to `copy_fwkern.conf`. When the `fwk` process starts, it loads the kernel parameters from the `copy_fwkern.conf` file.   

If the `fwk` process requires recovery, it discards all parameters set on-the-fly and reloads the parameters from `copy_fwkern.conf`. As a result, all parameters configured on?the?fly are lost.

## Solution

This solution requires authentication. Please log in to view the full solution.

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