showing NAS-IP of 127.0.01 instead of

Hi, I'm running FreeRADIUS Version 2.1.5. We are trying to do system authentication for some users. Doing this by creating huntgroups based on NAS-IP-Address, and then telling that huntgroup to use System for authentication. The problem is that although the Access-Request packet is shown as coming from the correct host, that host's ip address is not showing up as the NAS-IP-Address for that request. Instead, it's showing as 127.0.0.1 as seen below: rad_recv: Access-Request packet from host 192.168.27.7 port 53201, id=130, length=51 User-Name = "xm7z1" User-Password = "abc.123" NAS-IP-Address = 127.0.0.1 I'm wondering what could cause this? Any help is appreciated. Thanks Matt