On Fri, Mar 02, 2001 at 05:21:23PM +0100, mouss wrote:
 
> At 11:17 01/03/01 -0800, Devin L. Ganger wrote:

> >For all intents and purposes, RFC1918 addresses are non-existing.  As
> >long as all the machines that *need* to talk to that router as an
> >endpoint know how to route to it, it should be fine.
 
> uhumh?
> just see how traceroute works and you see that this is bad.

Start TTL at 0, set the destination IP to the IP of the endpoint, and
increment the TTL until you stop getting ICMP errors.

As long as each hop knows how to route to the next, Bob's yer uncle.  My
endpoint doesn't have to know that a.b.c.d is passing off to
172.16.18.24, which in turn passes off to a.b.e.f, as long as a.b.c.d
and 172.16.18.24 do.

> if my net is using a private addr space, and some ISP router uses the same
> net, how can I traceroute through it? can't....

I beg to differ.  I've clearly tracerouted *through* private address
spaces.  The trick is that the target of the traceroute can't be the
private address -- but I'm not so sure I'd want folks to be using my
routers as the targets of their pings, traceroutes, etc. anyway.

-- 
Devin L. Ganger <[EMAIL PROTECTED]>
A guy, his car, his miss, his nerve;
He kissed his miss and missed the curve.
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