Kernel message..

Hi! I have a question about the SuSE Firewall 2.0 script. I use this script for my firewall cause it's easy and I thing there are good rules. I'm connected to the internet through a cable modem. But I get some entrys in the messages log.. (/var/log/messages) like the following line.. kernel: martian destination 00ffffff from 0200e6ba, dev eth0 These lines are very often.. What can I do against this? What's this line? Thanks for you help, Chris