This is one thats been driving me a bit crazy.
Basically, I have a PPTP server that cannot be hardwired to the ADSL router directly.
As a result it is hardwired to a hub which is connected to a hardware wireless client, the Netgear WG602v3. This has a couple of modes one of them being "Client Mode" which means it serves as a fat wireless card in whatever router/hub its connected too.
At the same hub are my desktop, my laptop, my squeezebox and a couple of other things.
VPN traffic will not pass through the wireless client. Any other sort of traffic will flow fine.
The PPTP server is linux based. If I plug the PPTP server directly into the ADSL router it works fine. Over the wireless client it doesnt.
As process of elimination I setup a PPTP server on my XP desktop which is connected to the wireless client and it didnt work either.
I've searched far and wide on google, netgear forums, here and haven't found anything.
My initial guess is that the wifi client isn't passing GRE 47 and I can't find any option that has anything to do with VPN's on the client.
Any help would be greatly appreciated.
I've attached a picasso grade network diagram to help visualise my setup.