nasipaddress Freeradius report private IP (i want the pubblic)

Hi to All,
i have this scenarios:

(RB private IP)–>(ADSL Modem Public IP)–>(FreeradiusServer Public IP)

On Freeradius server the field nasipaddress in raddccat table report the privateIP and not the public natted ip.
Can i log the pubblic natted IP on my freeraduius server?

Thanks to all.

“nasipaddress” is the address of the device that submitted the Radius request (the router that is terminating the PPP or other session). You can control which address from your router is reported as the nasipaddress by changing the “Src. Address” parameter within the Radius Server definition of your router (/radius set 0 src-address=1.2.3.4). In order for that to work, the desired Public IP address must be physically on the router that is performing the Radius request.