[pptp-server] a Cosmetic problem

[Joe Polcari]

Jerry,

mtu 1452 in pptp options file FIXED the URL problem!!
I'll try OutLook tomorrow.

THANKS!


Joe Polcari wrote:

> Jerry,
>
> Does this mean that since I am masqing anything coming in on my eth0 interface
> and going out any interface except eth0, that I should set eth0 MTU
> to 1452 or the PPP interface MTU to 1452?
>
> Joe
>
> Jerry Vonau wrote:
>
> > Joe:
> >
> > Well I'll try to explain..
> >
> > The web server on the lan see the pptp server's lan card has
> > a mtu of 1500,
> > but if it sends the max of 1500 then it will not fit into
> > the ppp frame.
> > There is overhead involved with the encapsulation, as a
> > result it has to
> > fragment the frame. If it has the "don't fragment bit" set
> > then it can't
> > go any farther down the pipe....
> >
> > Found this at :
> > http://feenix.burgiss.net/ldp/adsl/configure.html
> >
> > ----quote------
> >
> > Note: PPPoE adds 8 bytes of extra overhead to the ethernet
> > frames
> > and the correct maximum setting for the ppp0 interface MTU
> > is
> > 1492. If the MTU is set too high, it may cause failure of
> > some web
> > pages to load properly, and possibly other annoying problems
> > related
> > to Path MTU Discovery. You may need to also set the MTU for
> > interfaces
> > on any masqueraded LAN connections MTU to 1452. This does
> > not apply to
> > PPPoA, or bridged configurations, just PPPoE!
> > ----------------
> >
> > Since both PPPoE and PPTP run on PPPD this may be the same
> > type of problem.
> >
> > Just a shot in the dark, but it fits what your are
> > describing
> >
> > Jerry
> >
> > Joe Polcari wrote:
> > >
> > > No, I haven't. Can you explain why that might make a difference
> > > based on the address of the web page???
> > >
> > > Jerry Vonau wrote:
> > >
> > > > Joe:
> > > >
> > > > Have you tried playing with the mtu settings on either the ppp link or the
> > > > ethernet interface for the lan? Sounds like a fragmentation problem to me, similar
> > > > to some PPPoE problems loading web pages.
> > > >
> > > > Jerry Vonau
> > > >
> > > > Joe Polcari wrote:
> > > >
> > > > > Nope. That's not it.
> > > > > I can go to http://www.vibrationresearch.com or
> > > > > http://www.vibrationresearch.com/
> > > > > but not to
> > > > > http://www.vibrationresearch.com/pptpd or
> > > > > http://www.vibrationresearch.com/pptpd/
> > > > >
>
> To see more info, follow the thread - Joe
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