4.
Web Management
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8.
Authentication Protocol:
You can choose authentication protocol as PAP,
CHAP, MS-CHAP, or MS-CHAP v2. The protocol you choose must be
supported by remote L2TP server.
9.
MPPE Encryption:
Check the “Enable” box to activate MPPE encryption.
Please note that MPPE needs to work with MS-CHAP or MS-CHAP v2
authentication methods.
10.
NAT before Tunneling
: Check the “Enable” box to let hosts in the Intranet
of Business Security Gateway
can go to access Internet via remote PPTP
server. By default, it is enabled. However, if you want the remote PPTP
Server to monitor the Intranet of local Business Security Gateway, the
option can’t be enabled.
11.
LCP Echo Type:
Choose the way to do connection keep alive. By default, it
is “Auto” option that means system will automatically decide the time
interval between two LCP echo requests and the times that system can
retry once system LCP echo fails. You also can choose “User-defined”
option to define the time interval and the retry times by yourself. The last
option is “Disable”.
12.
Tunnel:
Check the “Enable” box to activate the tunnel.
4.2.3.5
GRE
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco
Systems that can encapsulate a wide variety of network layer protocols inside virtual
point-to-point links over an Internet Protocol internetwork.
4.2.3.5.1 GRE VPN Tunnel Scenario
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco
Systems that can encapsulate a wide variety of network layer protocols inside virtual
point-to-point links over an Internet Protocol internetwork.
4.2.3.5.2 GRE Configuration
There is one common GRE VPN connection scenario as follows:
•
GRE Server / Client Application
The Business Security Gateway acts as GRE Server or Client role in
SMB Headquarters or Branch Office.