dmsg Error

[David A. Bandel]

Regurgitating the prose of Tom Condon Tom Condon <tomc at sounddsl.com> on
Tue, 7 Dec 2004 22:57:17 -0800:

|
|While checking dmsg for any reports of problems while trying my serial 
|port access, I found a number of the following:
|
|martian source 10.0.0.255 from 10.0.0.4, on dev eth0
|ll header: ff:ff:ff:ff:ff:ff:00:30:85:e6:62:99:08:00
|
|Would anyone out there know what the source of such a message would 
|be?

You'd have to trap the link-level header (ARP) on this.  M$ systems
broadcast lots of martians.  They are unroutable packets that seemingly
have dropped out of nowhere.  Alternately, they can be private IPs that
arrived from the Internet (and so aren't routable), or a packet that's
arrived on the wrong interface (internal IP on the external interface,
external IP on the internal interface, anything other than lo on lo)
etc.  Basically, if you can't answer the bloody thing, it's a martian. 
See RFC 1812, it discusses martians.  Mostly harmless, but annoying
none-the-less.  Turn off martian logging
(/proc/sys/net/ipv4/conf/*/log_martians = 0) if it annoys you.

Ciao,

David A. Bandel
-- 
Focus on the dream, not the competition.
		Nemesis Racing Team motto
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