What may be causing these errors?

[Dr. Jones]

I get the following errors, seen upon rebooting while closing systems 
down, and then again during boot up. I would love to figure out where 
they are from and how to fix my system to prevent this:

Dec 12 06:47:16 scott syslogd 1.4.1#16: restart.
Dec 12 06:54:22 scott kernel: 166.70.4.82 sent an invalid ICMP type 3, 
code 13 error to a broadcast: 255.255.255.255 on eth0
Dec 12 07:06:22 scott kernel: 166.70.4.82 sent an invalid ICMP type 3, 
code 13 error to a broadcast: 255.255.255.255 on eth0

My network interface card is eth0......my ISP is at 166.70.xxx.xxx.

These errors seem to continue despite clean shutdown and reboot......

Any ideas on what could be causing this?

Scott

-- 
Dr. Scott S. Jones
Hands-On Chiropractic 
IRC: irc.freenode.net #utah
Yahoo: sanchiro12