Security Gateway Manual
SG-3100
2.6.1 Requirements
• This guide assumes the underlying interface is already present (e.g. physical port, VLAN, etc).
• Choose a new local subnet to use for the additional LAN type interface. This example uses
192.168.2.0/24
.
2.6.2 Assign the Interface
The first step is to assign an OPT interface.
• Navigate to
Interfaces > Assignments
Look at list of current assignments. If the interface in question is already assigned, there is nothing to do. Skip
ahead to the interface configuration.
• Pick an available interface in
Available network ports
If there are no available interfaces, then one may need to be setup in some other way (e.g. VLANs).
• Click
Add
The firewall will assign the next available OPT interface number corresponding to the internal interface designation.
For example, if there are no current OPT interfaces, the new interface will be
OPT1
. The next will be
OPT2
, and so
on.
Note:
As this guide does not know what that number will be on a given configuration, it will refer to the interface
generically as
OPTx
.
The newly assigned interface will have its own entry under the
Interfaces
menu and elsewhere in the GUI.
2.6.3 Interface Configuration
The new interface must be enabled and configured.
• Navigate to
Interfaces > OPTx
• Check
Enable interface
• Set custom name in the
Description
, e.g.
GUESTS
,
DMZ
, etc.
• Set the IP address and CIDR mask for the new LAN
For this example,
192.168.2.1/24
.
•
Do not
add or choose a gateway
• Uncheck
Block private networks
This interface is a private network, this option would prevent it from functioning.
• Uncheck
Block bogon networks
The rules on this interface should only allow traffic from the subnet on the interface, making this option unnec-
essary.
• Click
Save
• Click
Apply Changes
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