strange packets

[Klingesberger Otto]

Hi !

Yesterday i saw many strange packets on
our netfilter proxy firewall.

The output of tcpdump shows plenty of the following
packets:

09:07:42.443298 0:0:0:0:0:30 1:0:0:0:0:0 8808 60:
09:07:42.485245 0:0:0:0:0:30 1:0:0:0:0:0 8808 60:
09:07:42.527191 0:0:0:0:0:30 1:0:0:0:0:0 8808 60:
09:07:42.569138 0:0:0:0:0:30 1:0:0:0:0:0 8808 60:

I dont think that these are valid mac-adresses.

Any hints ?

Regards, Otto Klingesberger