Wrong MAC Address on ARP

Question

Hello, 
 if i do a arp request from internal Network to a device behind a Red15 (Standard/Unified) i get the MAC of the SG/UTM not of the device behind the RED. 
 Whats wrong here? 
 Best Regards 
 Phill

dirkkotte · Answer

That#s correct. 
 behind a routing instance (layer3-border) you see the MAC of the router (gateway) which should forward the packet. 
 The device-MAC you see only within the same L2 network. 
 if you ping from UTM, you see the client-mac at the UTM.