North American Network Operators Group

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Re: Maybe I'm misreading this but...

  • From: Michael Shields
  • Date: Fri Oct 16 18:08:51 1998

In article <[email protected]>,
I Am Not An Isp <[email protected]> wrote:
> At 01:12 PM 10/16/98 -0400, tvo wrote:
> >Doesn't this break MTU path discovery though?
> 
> No, it wouldn't.  Those addresses are not routable on the global 'Net,
> however, there is nothing stopping a device with an RFC1918 address from
> sending a packet onto the 'Net.

Except that many people filter out RFC 1918 at ingress, in the same
ACL that blocks spoofing of your own blocks.

(although if you see it in a traceroute you know that's not happening)
-- 
Shields, CrossLink.