> Source: [sk177966](https://support.checkpoint.com/results/sk/sk177966)

# sk177966 - Secure Network Distributor (SND) shows high CPU usage when 3DES  encryption is enabled

| Property | Value |
|----------|-------|
| Solution ID | sk177966 |
| Date Created | 2022-02-16 |
| Last Modified | 2022-06-09 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R81.10 (EOS), R81 (EOS) |
| OS | Gaia |

## Symptoms

- * A CoreXL Secure Network Distributor (SND) shows high CPU usage.
* CPU Spike Detective logs (*/var/log/spike_detective* ) show high SND percentages for 3DES processes.   
  Examples of entries for 3DES processes in the CPU Spike Detective logs:  
  *? one_block_encrypt.constprop*   
  *? one_block_decrypt.constprop*
* In most cases, many VPN Remote Access users use the 3DES Encryption method.

## Cause

The 3DES encryption algorithm causes performance issues. The 3DES encryption algorithm is not preferred by Check Point software during a negotiation with any modern web browser. For more information, see <sk113114>.

## Solution

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

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