Creating Or Modifying A Gre Interface; Button Bar; Presentation Of The Table - Stormshield SN series Configuration Manual

State
Name
(mandatory)
IP address
(mandatory)
Network mask
(mandatory)
Comments
(optional)

Creating or modifying a GRE interface

The GRE protocol allows encapsulating IP traffic in a point-to-point IP tunnel. This allows, for
example, routing networks from one site to another through a GRE tunnel without having to
declare this routing method on all routers in between.
GRE tunnels are not encrypted natively: they merely encapsulate. GRE traffic can however be
made to go through an IPSec tunnel.
To create or modify a virtual GRE interface, click on the "GRE interfaces" tab.

Button bar

Search
Add
Delete
Check usage
Click on Add in the toolbar. An additional row will be inserted into the table of GRE interfaces.

Presentation of the table

The table sets out seven fields of information:
State
Name(mandatory)
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Status of the interfaces:
Enabled: Double-click to enable the created interface.
Disabled: The interface is not in operation. The line will be grayed out in order to
reflect this.
Give the IPSec interface a name.
NOTE
To find out which characters are allowed or prohibited in various fields, please
refer to Appendix A: Allowed
Enter the IP address assigned to the virtual interface created.
The default value suggested is 255.255.255.252. Since virtual IPSec interfaces are
meant for setting up point-to-point tunnels, a network that allows assigning two
addresses is sufficient in theory. This value may however be customized.
Any text.
Search that covers interfaces.
Adds an "empty" interface. An added interface (sending of a command) is effective
only if its fields Name, IP address, Network mask, Tunnel source and Tunnel
destination have been entered.
Deletes one or several selected interfaces. Use the keys Ctrl/Shift + Delete to delete
several interfaces.
Represented by the icon
being used elsewhere in the configuration.
Status of the interfaces:
Enabled: Double-click to enable the created interface.
Disabled: The interface is not in operation. The line will be grayed out in order to
reflect this.
Give the GRE interface a name.
SNS - USER CONFIGURATION MANUAL V.3
names.
, this button indicates whether the selected interface is
sns-en-user_configuration_manual-v3 - Copyright © Stormshield 2016
VIRTUAL INTERFACES