Re: VPN Problems

Dave Nickason [SBS MVP] wrote:

There's been some discussion about whether GRE47 has to be enabled at the remote end. I can see why it would have to be, but I don't honestly know how it's set on my home router - whatever the mfr's default. I'd try enabling it on your end, where it for sure needs to be enabled, and if you get the same error, try enabling it on the remote router as well.


Assuming the usual stateful packet inspection, it should not be
necessary. I use two stages of NAT/SPI, one a 3Com router and the
other a Linux netfilter. Neither is set to allow either TCP/1723 or
GRE in, PPTP VPN works fine from behind them.
.

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