> Source: [sk114500](https://support.checkpoint.com/results/sk/sk114500)

# sk114500 - Check Point response to "BlackNurse" attack

| Property | Value |
|----------|-------|
| Solution ID | sk114500 |
| Date Created | 2016-11-13 |
| Last Modified | 2017-06-01 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- "BlackNurse" attack is a form of ICMP flooding, which may cause denial of service (for details and full report, refer to <http://blacknurse.dk>).

## Solution

Check Point Security Gateways are *not* vulnerable to the "BlackNurse" attack.

General recommendations:

* To prevent DoS flooding in general, follow [sk112454 - How to configure Rate Limiting rules for DoS Mitigation](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk112454).
* If Security Gateway runs on a Virtual Machine, then enable Firewall Priority Queues as per [sk105762 - Firewall Priority Queues in R77.30 / R80.10 and above](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk105762).

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