Mike, From: "Mike Jakubik" <[EMAIL PROTECTED]> Subject: Re: PPTP VPN using MPD behind NAT help needed Date: Wed, 14 Jul 2004 22:15:49 -0400 (EDT)
> > This seems like a DSL router's problem. Because PPTP encapsulates PPP > > using GRE, which is neither TCP nor UDP, routers sometimes can not NAT > > PPTP traffic. Some router conqurs this problem by simply "passing > > through" GRE packets (and hence this feature is sometimes called "VPN > > Pass Through") assuming there is only one PPTP client behind NAT. What > > you are seeing is most likely this case. > > > > There are, however, routers with more intelligence in this regard, > > which is capable of handling GRE over NAT with many clients. 'natd' > > included in FreeBSD is one of such "smart" NAT implementation. > > Thanks, but what has me concerned is that fact that one client can connect > just fine. I belive they are using a watchguard firebox as their firewall. "One client works just fine but not two or more clients simultaneously" is a typical symptom you'll see when NAT device does simple "VPN Pass Through". > Aother strange thing is that we have had a Windows 2003 server behind this > Dlink router, and VPN worked with the Windows server. This is what led me > to belive that it may be something else. Do you mean you used Windows 2003 Server as a PPTP server or a PPTP client? If you used it as a PPTP client, did it always work OK with other PPTP clients simultaneously through that DLink router? Regards, _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
