The arping in debian crashes after the first ping: debian:~# arping 192.168.1.1 ARPING 192.168.1.1 60 bytes from 0b:00:0c:07:3c:78 (192.168.1.1): index=0 time=511.885 usec ---- HANGUP ---- I testet it on different Servers with Sarge with 3com and Intel network cards. Does not work on any. Regards, Michael