[NTLUG:Discuss] strange error messages

[Bug Hunter]

  We connected to a dsl, and we are getting these error messages, from
redhat 6.2 system:
May 10 20:03:04 mail kernel: 146.188.138.133 sent an invalid ICMP error to
a broadcast.

May 10 20:03:04 mail kernel: 146.188.240.58 sent an invalid ICMP error to
a broadcast.

May 10 20:03:04 mail kernel: 209.101.253.74 sent an invalid ICMP error to
a broadcast.

May 10 20:03:04 mail kernel: 146.188.240.58 sent an invalid ICMP error to
a broadcast.

May 10 20:03:04 mail last message repeated 3 times

  Any IDEAS of what is going on??