> Source: [sk166453](https://support.checkpoint.com/results/sk/sk166453)

# sk166453 - Unable to connect SMB appliance with Harmony Connect when the appliance has dynamic IPs

| Property | Value |
|----------|-------|
| Solution ID | sk166453 |
| Date Created | 2020-04-22 |
| Last Modified | 2022-07-20 |
| Technical Level | General |
| Products | Spark Firewall (Locally Managed) |
| Versions | R81.10.X |
| Platform | 1500, 1600, 1800, 910 |

## Symptoms

- The VPN tunnel does not come up when the user tries to configure the connection between SMB appliances and CloudGaurd Connect (CGC) using dynamic IPs or FQDNs.

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## Cause

Out of the box SMB appliances only support dynamic IP authentication using certificates, and Harmony Connect only supports dynamic IP authentication using FQDN and pre-shared-key.

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## Solution

This feature is currently not supported.  

If you have an alternative device which supports IPSec and authentication using FQDN and pre-shared key, use the "generic instructions".

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