"Error: Original Source:Unknown service class" is displayed while creating a NAT policy.

03/26/2020 13 People found this article helpful 200,089 Views

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Description

This KB article explains the reason of the error "Original Source:Unknown service class"displayed when creating a NAT policy.

Cause

Technically it is not possible to translate single port into multiple port numbers, so when a NAT policy is created to translate single port number to multiple port numbers it will throw an error message "Error: Original Source:Unknown service class". 

Resolution

When creating a NAT policy, make sure that service translation is configured correctly, single port number can be translated only to one port number.

NOTE: Vice versa is possible, multiple ports can be translated into single port.

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