Connect to Port 0

Hi, as far as I know Ports 8 and 0 are unassigned. What does the following = entry in /var/log/firewall mean? Dec 1 11:02:12 inet kernel: Packet log: input ACCEPT eth1 PROTO=3D1 = 131.246.137.5:8 a.b.c.d:0 L=3D1500 S=3D0x00 I=3D19222 F=3D0x4000 T=3D242 = (#15) The firewall should block this connect. We are using Suse 7.1 with = standard firewall configuration. Access is allowed only on smtp, www and https. Thanks Georg