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Date:      Mon, 12 Oct 2009 16:14:06 -0700
From:      "Michael K. Smith - Adhost" <mksmith@adhost.com>
To:        "Julian Elischer" <julian@elischer.org>, "Doug Barton" <dougb@FreeBSD.org>
Cc:        freebsd-net@freebsd.org
Subject:   RE: Wacky DHCP values that work in windows but not in FreeBSD
Message-ID:  <17838240D9A5544AAA5FF95F8D52031606D020C7@ad-exh01.adhost.lan>
In-Reply-To: <4AD3B4E3.2090406@elischer.org>
References:  <4AD3ABD0.7010603@FreeBSD.org> <4AD3B4E3.2090406@elischer.org>

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> -----Original Message-----
> From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-
> net@freebsd.org] On Behalf Of Julian Elischer
> Sent: Monday, October 12, 2009 4:00 PM
> To: Doug Barton
> Cc: freebsd-net@freebsd.org
> Subject: Re: Wacky DHCP values that work in windows but not in FreeBSD
>=20
> Doug Barton wrote:
> > Howdy,
> >
> > I usually have a wireless router connected directly to the
AT&T/Yahoo
> > DSL modem but last night I wanted to do some debugging so I plugged
> my
> > laptop directly into the modem (after powering off the modem, etc.).
> >
> > The values I got back from DHCP not only don't make sense, they
> didn't
> > work in FreeBSD at all. Dual-booting to Windows showed that the
> values
> > I saw from DHCP were "correct," and somehow they managed to work.
> > Taking a closer look at the router after I plugged it back in showed
> > the same.
> >
> >         Dhcp Enabled. . . . . . . . . . . : Yes
> >         Autoconfiguration Enabled . . . . : Yes
> >         IP Address. . . . . . . . . . . . : 76.212.147.xxx
> >         Subnet Mask . . . . . . . . . . . : 255.255.0.0
> >         Default Gateway . . . . . . . . . : 151.164.184.xxx
>=20
> huh?
>=20
> only way this could work would be if it was marked as "point to point"
> I think..

That could be a primary IP address on an interface on which your 76
address is a sub interface.  The interface will do proxy-arp when a
traffic request comes in.  Or something else!  I'm not sure if this will
work, but you could actually hard code your default gateway with a
-hopcount 2 (or higher) and see if that works.  I've not tried it on a
live machine.  Something like route add default 151.164.184.xxx
-hopcount 5.  You may have to delete the DHCP-assigned entry first.

Regards,

Mike



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