You modified kernel parameters and after rebooting the gateway, a lot of production traffic gets dropped and the gateway acts strangely What should you do"?

You modified kernel parameters and after rebooting the gateway, a lot of production traffic gets dropped and the gateway acts strangely What should you do"?
A . Run command fw ctl set int fw1_kernel_all_disable=1
B . Restore fwkem.conf from backup and reboot the gateway
C . run fw unloadlocal to remove parameters from kernel
D . Remove all kernel parameters from fwkem.conf and reboot

View Answer

Answer: B

Explanation:

If you have modified kernel parameters (in fwkern.conf, for example) and the gateway starts dropping traffic or behaving abnormally after a reboot, the best practice is to restore the original or a known-good configuration from backup. Then, reboot again so that the gateway loads the last known stable settings.

Option A (fw ctl set int fw1_kernel_all_disable=1) is not a standard or documented method for “undoing” all kernel tweaks.

Option B (Restore fwkem.conf from backup and reboot the gateway) is the correct and straightforward approach.

Option C (fw unloadlocal) removes the local policy but does not revert custom kernel parameters that have already been loaded at boot.

Option D (Remove all kernel parameters from fwkem.conf and reboot) might help in some cases, but you risk losing other beneficial or necessary parameters if there were legitimate custom settings. Restoring from a known-good backup is safer and more precise.

Hence, the best answer:

“Restore fwkem.conf from backup and reboot the gateway.”

Check Point Troubleshooting Reference

sk98339 C Working with fwkern.conf (kernel parameters) in Gaia OS.

sk92739 C Advanced System Tuning in Gaia OS.

Check Point Gaia Administration Guide C Section on kernel parameters and system tuning.

Check Point CLI Reference Guide C Explanation of using fw ctl, fw unloadlocal, and relevant

troubleshooting commands.