Am I missing something? (ADSL-MASQing)
Mark Purcell
mark at purcell.homeip.net
Tue May 21 20:45:22 EST 2002
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On Tue, 21 May 2002 11:10, Neil Symons wrote:
> I've configure my home Ok, and a Business
>
> However another Business I am helping out cannot seem to Surf Direct nor
> able to finish downloading their first e-mail when popping on all their
> Windoze Boxes behind the router.
Had a similar problem when I first got onto ADSL, napster downloads would
never finish. And I have heard of others having similar problems trying to
download largish files.
What ended up solving it was the -m option, which clamps the TCP maximum
segment size. The man page for pppoe states that you are strongly
recommended to use -m 1412 if you have a LAN behind your gateway, which seems
to fit your case exactly.
> pty "pppoe -I eth1 -T 80"
Mine reads:
pty "pppoe -I eth0 -T 80 -m 1412"
Hope that helps.
Mark
-m MSS Causes pppoe to clamp the TCP maximum segment size at the
specified value. Because of PPPoE overhead,
the maximum segment size for PPPoE is smaller than for normal
Ethernet encapsulation. This could cause
problems for machines on a LAN behind a gateway using PPPoE. If
you have a LAN behind a gateway, and the
gateway connects to the Internet using PPPoE, you are strongly
recommended to use a -m 1412 option. This
avoids having to set the MTU on all the hosts on the LAN.
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