"dds.transport.UDPv4_WAN.builtin.port_offset"

This property allows using the built-in UDPv4 transport and the Real-Time WAN Transport at the same time.

<transport_builtin>
     <mask>UDPv4_WAN|UDPv4</mask>
 </transport_builtin>

When the UDP ports used by Real-Time WAN Transport are not explicitly set, they are calculated as follows: RTPS port + port_offset.

[default] 125