I am working on an arch linux machine with ethernet interface eth1. I have created interface eth1:0 using ifconfig and given it a dummy hw address (00:01:02:03:04:05). When I send a UDP packet to a server application running on a remote server machine, I get back the right response. But then I see ICMP Destination Unreachable going out from the eth1:0 interface ip address. How can I mute this ICMP message? I have tried different mac addresses, setup arp cache on both client and server machines without success.
Appreciate any help and thanks in advance.