I am getting the same error message as shown below. I have a Linksys router and have done the port forwarding properly. I think this has to do with GRE packets, but I am not sure what is to be done now. Btw I am trying this out with my iMac and iphone.
I am also trying to set up a vpn tunnel so that I can view my cablevision channels on my Ipad while away from home. I followed the instructions but can't get it to work. I am using EASYVPN on an IMAC , but when i try to connect from my Ipad, i get the following messages logged in EasyVPN
2011-04-12 21:26:40 EDT Incoming call... Address given to client = 192.168.1.133
Tue Apr 12 21:26:40 2011 : PPTP incoming call in progress from '192.168.1.1'...
Tue Apr 12 21:26:40 2011 : PPTP connection established.
Tue Apr 12 21:26:40 2011 : Using interface ppp0
Tue Apr 12 21:26:40 2011 : Connect: ppp0 <--> socket[34:17]
Tue Apr 12 21:27:10 2011 : LCP: timeout sending Config-Requests
Tue Apr 12 21:27:10 2011 : Connection terminated.
Tue Apr 12 21:27:10 2011 : PPTP disconnecting...
Tue Apr 12 21:27:10 2011 : PPTP disconnected
2011-04-12 21:27:10 EDT --> Client with address = 192.168.1.133 has hungup
Any suggestions as to what I'm doing wrong?