> I think it is an OS-misconfiguration, so I checked the firewalls > arp-cache. There is only one entry at a time!
Note that the "arp -a" command on some versions of Linux only displays
one of the arp entries. Use "cat /proc/net/arp" to see them all.
This problem happens for me under Slackware 96/Linux 2.0.0 .