"Error: Original Source:Unknown service class" is displayed while creating a NAT policy.
03/26/2020 12 15332
This KB article explains the reason of the error"Original Source:Unknown service class"displayed when creating a NAT policy.
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".
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.