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 I still use the following lines in my ppp.conf?
set mru 1492
set mtu 1492
Thanks in advance,
Greg
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