[pptp-server] NAT'ing problem

[Jerry Vonau]

Chris:

I think this may apply  to your situation,

taken from :

http://www.ibiblio.org/pub/Linux/docs/HOWTO/VPN-Masquerade-HOWTO

section 2.7:


  The PPTP RFC specifies in section 3.1.3 that there may only be one
  control channel connection between two systems. This should mean that
  you can only masquerade one PPTP session at a time with a given remote
  server, but in practice the MS implementation of PPTP does not enforce
  this, at least not as of NT 4.0 Service Pack 4. If the PPTP server
  you're trying to connect to only permits one connection at a time,
  it's following the protocol rules properly.  Note that this does not
  affect a masqueraded server, only multiple masqueraded clients
  attempting to contact the same remote server.

Hope it helps..

Jerry Vonau



> > -----Original Message-----
> > From: Chris Dos [SMTP:chris.dos at clarent.com]
> > Sent: Wednesday, May 09, 2001 2:24 PM
> > To:   pptp-server at lists.schulte.org
> > Subject:      [pptp-server] NAT'ing problem
> >
> > I have two employees behind the same cable modem which is providing NAT
> > for their internal network.  The cable modem can NAT one connection to my
> > PopTop PPTP server just fine.  But it fails when the second person tries.
> > Both can connect simultaneously to a Windows NT PPTP server.  Does anyone
> > know of a reason why PopTp only allows one PPTP connection per NAT'd
> > device that supports multiple PPTP NAT'ing?
> >
> >       Chris
> >
> > --
> > Chris Dos     Lead Unix Engineer
> > Clarent       Corporation
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