[nycbug-talk] Fwd: icmp redirects from host A to host A

[Jesse Callaway]

On Mon, Nov 10, 2008 at 4:44 PM, Max Gribov <max at neuropunks.org> wrote:
> Hi all,
> saw this today in dmesg on one of the freebsd servers i have:
> icmp redirect from xx.xx.149.215: xx.xx.153.131 => xx.xx.153.131
>
> is that just general brokenness, or is there a reason to do something
> like that?..
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I ain't no ICMP expert, but this looks like there's some crap going on.

from wikipedia ... "RFC1122 states that redirects should only be sent
by gateways and should not be sent by Internet hosts."

Even then... accepting routes over ICMP is probably not SOP for most
router maintainers I would venture to guess. Something is likely
broken. Are you on more than one subnet?

-jesse