Date: Fri, 15 Dec 2000 01:03:36 +0000 From: Brian Somers <brian@Awfulhak.org> To: "Renaud Waldura" <renaud@waldura.com> Cc: net@freebsd.org, "Brian Somers" <brian@Awfulhak.org>, brian@Awfulhak.org Subject: Re: PPPoE w/ nat auto fragmentation hack? Message-ID: <200012150103.eBF13aU52009@hak.lan.Awfulhak.org> In-Reply-To: Message from "Renaud Waldura" <renaud@waldura.com> of "Thu, 14 Dec 2000 09:50:18 PST." <003101c065f6$52ddc640$0402010a@biohz.net>
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> I'm happy to announce this problem has finally found its final solution in
> ppp version >= 11/28/2000: the new option "tcpmssfixup" (enabled by
> default!) corrects the outgoing TCP MSS and solves the problem for good.
> This functionality is strictly identical to what the tcpmssd port does, but
> it's now included in ppp, so no need to run an external program with divert
> sockets etc.
>
> Right on Brian! And thanks to Ruslan and Julian. Great job guys.
And thank you for taking the time to report things as working :-)
> ----- Original Message -----
> From: Brian Somers <brian@Awfulhak.org>
> To: Renaud Waldura <renaud@waldura.com>
> Cc: Brian Somers <brian@Awfulhak.org>; <hackers@FreeBSD.ORG>;
> <brian@Awfulhak.org>
> Sent: Thursday, November 16, 2000 1:37 PM
> Subject: Re: PPPoE w/ nat auto fragmentation hack? (use tcpmssd port)
>
>
> > > > ppp will run programs as the user id that invoked ppp rather than
> > > > using the effective user id (ie, it runs things as *you*, not *root*).
> > >
> > > Mmm-mmh. In my case, since ppp is started at boot time, the only user
> that
> > > ever invokes it is root, hence the tcpmssd thingy is run as root. As
> > > confirmed by the multiple "ps" I ran: euid == ruid == svguid == 0.
> > >
> > >
> > > > A good ``first step'' is to run
> > > > ! sh -c "/usr/local/bin/tcpmssd -p 12345 -i INTERFACE >/tmp/log
> 2>&1"
> > > > so that you can get to see any error messages - ppp redirects I/O to
> > >
> > > Yup, tried that, here's what I get:
> > >
> > > ******************** start ***************
> > > Wed Nov 15 13:30:12 PST 2000
> > > id says: uid=0(root) gid=0(wheel) groups=0(wheel)
> > > HOME=/
> > > PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin
> > > 01001 divert 1234 tcp from any to any out xmit tun0 setup
> > >
> > > The rule gets inserted, tcpmssd runs as root, and I feel like a dummy.
> Any
> > > other ideas?
> > >
> > > Thanks for the help Brian,
> >
> > I'm not sure what the problem could be - can you confirm that
> > everything's seen if you divert everything ?
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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