NSX UI does not allow the configuration of port ranges in the DNAT in Translated port section, and the same fails with the below error message:
[error_code=10503, module_name=ROUTING, error_message='[NAT] "translated_ports" of NAT action DNAT does NOT support port range.
VMware NSX
VMware NSX-T Data Center
This is a known issue, NSX UI currently does not allow port ranges in the Translated service/Port field on NAT.
Workaround: