VPN server and Client are running on Win7 Ultimate version
Have tested with Linksys Router with GRE Passthrough turned On and got the same error (806)
Successful VPN connecting with other laptop in the same LAN.
Error found in Event Viewer is as below:
A connection between the VPN server and the VPN client 188.8.131.52 has been established, but the VPN connection cannot be completed. The most common cause for this is that a firewall or router between the VPN server and the VPN client is not configured
to allow Generic Routing Encapsulation (GRE) packets (protocol 47).
5. From the Firewall audit log, I could see only log saying about
Port 1723, couldn't see any related to Protocol 47.
The Windows Filtering Platform has permitted a connection.
Source Address:[VPN Server IP]
Destination Address:[My DDNS IP]
6. Run PPTP command: pptpsrv.exe and pptpcInt.exe
Output: Client side - connectivity test to TCP Port 1713 was successful, creating a socket to test GRE traffic and sent out.
Server side - Stopping at "Listening on PROTOCOL 47 for incoming GRE packets...."
Can someone help me figure out where GRE get blocked please????
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