Hello,
Sietse van Zanen a écrit :
For PPTP/GRE to work you need to add two rules:
1 for the PPTP connection (TCP Port 1723) and 1 for the GRE Protocol (IP proto 47).
If you want your machine to connect to a PPTP server on the Internet,
allow PPTP OUTBOUND towards that server and GRE INBOUND from that server.
If you want a client on the Internet connect to your PPTP server,
allow both PPTP and GRE INBOUND to your server.
According to this, neither the client or the server are allowed to
establish an outbound GRE connection. How can this work ?
