> Source: [sk180682](https://support.checkpoint.com/results/sk/sk180682)

# sk180682 - Application Control in Harmony Endpoint Cloud blocks client connection

| Property | Value |
|----------|-------|
| Solution ID | sk180682 |
| Date Created | 2023-03-02 |
| Last Modified | 2023-03-13 |
| Technical Level | Advanced |
| Products | Endpoint Security |
| Versions | Cloud, R82.20, R82.10, R82, R81.20 |
| OS | Windows |

## Symptoms

- * The default action in the Harmony Endpoint Application Control is set to Block.
* The network services, such as DNS and DHCP are not allowed after the policy is installed.
* Harmony Endpoint Security Client gets disconnect from the server.

## Cause

1. Networking services, such as DNS and DHCP are blocked by the policy.
2. `sychost.exe `was missing in the allowed application list.

## Solution

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

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