Client's without default gateway

[Rafi]

Hi,

Recently i disable linux server, this linux server was the default gateway for sensor's.

Some of the sensor don't have the ability  to configure default gateway so  in order to reach them from different network i configured on the server interface proxy-arp.

Now the fortigate is the default gateway for all the sensors, i added new vdom with intra-link vdom to root vdom, as it was defined on the server. on the fortigate i configured proxy-arp, but this didn't do the job.

172.16.6.1 is ip on the fortigate (act as the default ip) for sensors.

config system proxy-arp     edit 1         set interface "AirCond"         set ip 172.16.6.1     next end

My problem is that i cant reach to the sensors (without default gateway) from external network, all the sensors with default gateway works ok.

Is there any way to make the sensors to replay to  ip that is not on same segment as the sensors ?

(like proxy arp on the server)

i use fortigate 3600c version 5.0

Regrads

Rafi