> > "Matthew Emmerton" wrote:
> >
> > | From: "Greg Black" <[EMAIL PROTECTED]>
> > | To: <[EMAIL PROTECTED]>
> > | Sent: Friday, February 22, 2002 10:39 PM
> > | Subject: ppp -nat fails with adsl, but ok with modem
> > |
> > | > I've had ppp -nat working just fine over a normal modem link,
> > | > but it is not working at all well on my ADSL link to the same
> > | > provider.
> > | >
> > | > To quantify "not working at all well", although I can ping and
> > | > traceroute ok from the hosts on my LAN, HTTP and FTP traffic is
> > | > so slow and bursty as to be useless.  Clicking on a link with
> > | > Netscape will see short bursts of data with long periods (of a
> > | > minute or more) where it says "stalled".
> > | >
> > | > Clicking on <http://www.freebsd.org/gnome/newsflash.html> from
> > | > my gateway host gets the page in an eye-blink, but on the NAT
> > | > hosts, it will take 40 seconds to load the top banner and the
> > | > "FreeBSD GNOME News Flash" heading, then another delay of 40 or
> > | > so seconds before the rest of the page will be displayed.  Even
> > | > then, Netscape thinks it has stalled and keeps waiting for the
> > | > last bit of data.
> > | >
> > | > With FTP, a small transfer (e.g., a directory listing of / on
> > | > ftp.freebsd.org) will complete normally; but something slightly
> > | > larger (e.g., a listing of /pub/FreeBSD on the same server),
> > | > will produce:
> > | >
> > | >     ftp> cd /pub/FreeBSD
> > | >     250 CWD command successful.
> > | >     ftp> dir
> > | >     200 PORT command successful.
> > | >     150 Opening ASCII mode data connection for '/bin/ls'.
> > | >     ftp: netin: Connection reset by peer
> > | >     226 Transfer complete.
> > | >     ftp> quit
> > | >     421 Timeout (60 seconds): closing control connection.
> > | >
> > | > If I do the same things from the host that is connected to the
> > | > modem(s), everything works fine, for both types of connections.
> > | >
> > | > I'm finding this very frustrating, and I'm wondering if there's
> > | > something weird about PPPoE with the ADSL link that needs some
> > | > special magic in order for things to work properly.
> > | >
> > | > If anybody can point me at the truth, I'd be most grateful.
> > | >
> > | > Alternatively, if anybody can suggest steps I could take to
> > | > identify the nature of the problem, that would also be most
> > | > welcome.
> > | >
> > | > Greg Black
> > | >
> > | > To Unsubscribe: send mail to [EMAIL PROTECTED]
> > | > with "unsubscribe freebsd-net" in the body of the message
> > |
> > | What version of FreeBSD are you using?  The ppp included in early 4.x
> > | distributions doesn't have the TCP MSS fixup code that is required to
> make
> > | things work properly with a PPPoE connection, and cause the kinds of
> > | symptoms that you describe.
> >
> > The NAT box is running 4.2-RELEASE -- is that a problem?
> 
> Yes. This problem was first fixed in 4.2-STABLE.  There are two safe ways to
> fix this:
> - upgrade to a newer -RELEASE or -STABLE
> - run the tcpmssd program (which is in the ports collection -
> /usr/ports/net/tcpmssd)
  - Install the latest version of ppp from http://www.Awfulahk.org/ppp.html

> --
> Matt Emmerton

-- 
Brian <[EMAIL PROTECTED]>                <[EMAIL PROTECTED]>
      http://www.freebsd-services.com/        <brian@[uk.]FreeBSD.org>
Don't _EVER_ lose your sense of humour !      <brian@[uk.]OpenBSD.org>



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