Draytek vigor3900 User Manual page 298

Item
Enable GRE
Function
Local GRE IP
Remote GRE IP
Auto Generate
GRE Key
GRE In Key
GRE Out Key
6. After filling the required information for GRE, click the Proposal tab to open the
following page.
Available parameters are listed as follows:
Item
IKE Phase1
Proposal (Dial-Out)
IKE Phase1
Authentication
Description
Check the box to enable the function.
The virtual IP address of the router, specified for this tunnel.
The virtual IP address of the remote client, specified for this
tunnel.
Click Enable to generate the GRE key by the system
automatically.
If you click Disable, you need to type GRE key manually.
Type the hexadecimal number as GRE In Key. This value is
used for the router to authenticate the source of the packet.
The length is 4 bytes.
Type the hexadecimal number as GRE Out Key. This value
is used for the remote client to authenticate the source of the
packet. The length is 4 bytes.
Description
Propose the local available authentication schemes and
encryption algorithms to the VPN peers, and get its feedback
to find a match.
Propose the local available algorithms to the VPN peers, and
get its feedback to find a match.
290 Vigor3900 Series User's Guide