Date: Wed, 13 Oct 1999 23:31:12 +0100 From: Brian Somers <brian@Awfulhak.org> To: Richard Morte <ric@sinclairassoc.force9.co.uk> Cc: Brian Somers <brian@Awfulhak.org>, "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG>, brian@hak.lan.Awfulhak.org Subject: Re: Problem Accessing Internet via FreeBSD Gateway Message-ID: <199910132231.XAA01836@hak.lan.Awfulhak.org> In-Reply-To: Message from Richard Morte <ric@sinclairassoc.force9.co.uk> of "Wed, 13 Oct 1999 18:02:42 BST." <3804BB32.7216BDBF@sinclairassoc.force9.co.uk>
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Hi,
What does ``sysctl -a | fgrep ip.forward'' say ? I'd expect the
answer to be ``net.inet.ip.forwarding: 1'' indicating that the
machine is forwarding packets.
The difference is that because you've got a DNS on the gateway
machine, it's effectively acting as a proxy for your DNS requests and
is independent of the machines packet forwarding capability. ie:
windows DNS --> gateway DNS --> 'net
as distinct from
windows app -> gateway LAN interface -> gateway default interface -> 'net
> Brian Somers wrote:
> >
> > > Brian,
> > >
> > > Thank you once again for helping out. Yes, I did have TCP extensions
> > > enabled but, having disabled it in rc.conf, I still have the same
> > > problems.
> >
> > And have you got
> >
> > gateway_enable=YES
> >
> > in rc.conf too ?
>
> Yes I have.
>
> >
> > > Also see my postings under "Traceroute Problems via Gateway". I think
> > > its the same problem.
> > [.....]
> >
> > Yes, and you've got a DNS on the gateway box... so DNS lookups work
> > ok because nothing's being forwarded !
> > --
> Agreed, nothing's being forwarded, but I'm afraid you've lost me here...
> the gateway box is configured for DNS and DNS does seem to forward
> packets to the Windows clients because the IP address appears in the dos
> window. But that's all that appears and the process times out.
>
> The only other alternative to DNS was to make sure there were
> appropriate entries in /etc/hosts on the Gateway m/c and similar copies
> of hosts on the windows boxes. But this didn't work so that's when I
> first configured DNS. But note that the windows boxes still have
> c:\windows\hosts configured correctly as a fallback in case DNS doesn't
> work.
>
> However, since posting the original message, I have configured a dual
> boot machine on the network using a spare h/drive. Same problem. Local
> network accesses are OK; cannot link to the net from the 2nd FreeBSD
> machine. So the problem has to be with the gateway. I have the DNS/Bind
> cricket book (latest edition), Greg Lehey's excellent book and the
> O'Reilley Apache book, all of which I have read and re-read many times -
> but I've still got something misconfigured somewhere. I've also tried
> running ppp without the -alias flag and *then* launching natd using the
> -n tun0 flag, but this gives exactly the same result.
>
> Brian, I just seem to be completely stuck with the current symptoms and
> cannot see what the underlying cause is.
>
> Could you tell me more about "nothing's being forwarded" and what checks
> I can make?
>
> Kind regards,
> Ric
>
--
Brian <brian@Awfulhak.org> <brian@FreeBSD.org>
<http://www.Awfulhak.org>; <brian@OpenBSD.org>
Don't _EVER_ lose your sense of humour ! <brian@FreeBSD.org.uk>
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