Date: Wed, 12 May 2004 09:23:53 -0700 From: Darcy Buskermolen <darcy@wavefire.com> To: freebsd-net@freebsd.org Subject: Re: [4.9-R]Can I Make My DSL Connect Go Faster ? (OSX nat hint) Message-ID: <200405120923.53664.darcy@wavefire.com> In-Reply-To: <4097E60D.7090102@mac.com> References: <Pine.BSF.4.21.0404281418560.73191-100000@InterJet.elischer.org> <006f01c43206$eb5f4b20$3200a8c0@cbcoffice> <4097E60D.7090102@mac.com>
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On May 4, 2004 11:50 am, Chuck Swiger wrote:
> The Jetman wrote:
> [ ... ]
>
> > Wes: I've used a couple of Internet speed tests, at different time=
s,
> > but always w/ the same configs. Neither config has been modified. All
> > of the results are the same. I use ADSLGuide and DLSReports as my speed
> > tests, which are in different continents, but both report the same
> > speeds. I use different browsers, but Java is what does the deal.
>
> If you're using a DSL provider like Verizon which uses PPPoE, you might t=
ry
> adjusting your MTU down to 1490 or so, or else you will fragment large da=
ta
> packets and encounter quite a slowdown.
>
> Use something like this in your /etc/rc.conf file:
>
> ifconfig_fxp0=3D"inet 192.168.1.2 netmask 255.255.255.0 mtu 1490"
>
> ...or run ifconfig directly and see whether this helps.
On this exact note (and for sake of saveing hours for someone else...) , I=
=20
recently turned a Macintosh G3 box running OSX 10.3 into a firewall/nat bo=
x=20
without using their brain dead "internet shareing" tool. What I found was=
=20
their natd sucked wind unless you had the apple vender extention of=20
"clamp_mss yes" in your natd.conf
=46rom the natd man page:
-clamp_mss
This option enables MSS clamping. The MSS value is derived
from the MTU of the interface specified in the -interface
option.
I know this option isn't valid in FreeBSD's natd and I'm not sure if perhap=
s=20
it is handleded transparently. But with out this option under OSX I saw=20
simular problems as to what you are describing when natting packets, even=20
though the same download form the gateway were AOK
(Perhaps soemone a bit more versed on the internals of nat can comment on t=
his=20
under FreeBSD)
=2D-
Darcy Buskermolen
Wavefire Technologies Corp.
ph: 250.717.0200
fx: 250.763.1759
http://www.wavefire.com
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