> Brian Somers wrote:
> | > > "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
> | > > | >
> | > > | 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
>
> OK, I'll grab it and give it a try.
>
> Will it be OK to install that on a 4.1-RELEASE box?
Should be.
> Should I still use the following lines in my ppp.conf?
>
> set mru 1492
> set mtu 1492
These shouldn't be required any more.
> Thanks in advance,
>
> Greg
--
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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