> Source: [sk166534](https://support.checkpoint.com/results/sk/sk166534)

# sk166534 - NAT  with port translation for logical server not working after Security Gateway is upgraded to R80.20

| Property | Value |
|----------|-------|
| Solution ID | sk166534 |
| Date Created | 2020-04-27 |
| Last Modified | 2020-05-03 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * In a setup with logical server, were traffic is directed to the real IP addresses of physical servers, policy has a manual port translation rule to translate the destination port, after the upgrade to R80.20, port translation is not working.
* In the Original Destination column of NAT rule, the real IP address of the servers is configured. This configuration was working in version prior to R80.20.
* 'fw monitor' shows that the logical IP address is changing to the servers real IP address as expected, however the port translation is NOT happening.
* SmartLog also shows the destination port is not translating.

## Cause

A design change in R80.20 lead to this behavior.

## Solution

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

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