Motonori Shindo said:

> Mike,
>
> 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.
>
> Regards,

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.
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.


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