> Source: [sk165953](https://support.checkpoint.com/results/sk/sk165953)

# sk165953 - In a rare scenario, Security gateway freezes when IP pool NAT and VPN are used

| Property | Value |
|----------|-------|
| Solution ID | sk165953 |
| Date Created | 2020-03-24 |
| Last Modified | 2020-03-29 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * In a rare scenario, Security gateway freezes when IP pool NAT and VPN are used.
* In /var/log/message you can see similar errors:  
  `

  [DATE TIME] Hostname kernel: [fw4_0];Assertion 0 failed in kiss_handles.c:482`  
  `
  [DATE TIME] Hostname kernel: [fw4_0];fwhandle_get: Invalid handle - verifier`  
  `
  [DATE TIME] Hostname kernel: [fw4_0];fwhandle_get(fw_user.c:875): Table kbufs - Invalid handle 7362803 - entry used for handle 9c362803 with value ffffc200317eb9c8`
* Panic is captured following sk: [sk31511 - Check Point Security Gateway on SecurePlatform / Gaia freezes, crashes, or reboots randomly, core dump files are not created](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk31511)

## Solution

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