On Thu, 2006-10-26 at 10:39 -0400, Michael D. Spence wrote:
> > -----Original Message-----
> > From: Steven M. Bellovin [mailto:smb@cs.columbia.edu] 
> > Sent: Thursday, October 26, 2006 10:19 AM
> > To: Michael D. Spence
> > Cc: 'George Georgalis'; netbsd-users@NetBSD.org
> > Subject: Re: traceroute only shows beginning and end
> > 
> > 
> > On Thu, 26 Oct 2006 10:00:10 -0400, "Michael D. Spence" 
> > <spence@panix.com>
> > wrote:
> > 
> > > > -----Original Message-----
> > > > From: netbsd-users-owner@NetBSD.org 
> > > > [mailto:netbsd-users-owner@NetBSD.org] On Behalf Of 
> > George Georgalis
> > > > Sent: Thursday, October 26, 2006 8:48 AM
> > > > To: netbsd-users@netbsd.org
> > > > Subject: Re: traceroute only shows beginning and end
> > > > 
> > > > 
> > > > On Wed, Oct 25, 2006 at 06:58:53PM -0400, Michael D. Spence wrote:
> > > > >I recently got a new FIOS connection from Verizon.  There's a
> > > > >fancy router that comes with the package.  It works well, except
> > > > >when I do a traceroute via the router, every hop has the 
> > endpoint's
> > > > >address (although there do seem to be the correct number 
> > of hops).
> > > > > 
> > > > >What would make traceroute do this?  Could it be some sort of NAT
> > > > >misconfiguration?  (It's definitely the router, because 
> > if I use my
> > > > >other connection, all is correct.)
> > > > 
> > > > weird. does pkgsrc/net/mtr do the same thing?
> > > > 
> > > 
> > > I expect it will.  On further investigation, tcpdump 
> > reports that the 
> > > "time exceeded" packets have the wrong source address, which really
> > > sounds like a bug in the router to me.
> > > 
> > Bug or feature?  Maybe Verizon doesn't want you to see the network --
> > after all, you can't map out phone switches that way...
> > 
> 
> <g>.  Well, I guess, but their Tech Support didn't know anything about it.
> I'm going for the theory that this is a really new router (they just rolled
> it out) and some programmer at ActionTec's gonna smack himself in the
> forehead.
> 
>  
> 
> Michael D. Spence
> Mockingbird Data Systems, Inc.
> 
I wouldn't hold out great hopes for Verizon Tech support, since they are
firmly convinced that my neck of the woods (old United Telephone/GTE
territory is PPPoE, while since inception it has been straight DHCP from
the central switching office.