
Chapter 6 Network
140 X Family LSM User’s Guide V 2.5.1
IP Interfaces
Configuration Overview
IP interfaces provide the X family device with the interfaces to make the network connections required
for your environment. An IP interface is the Layer 3 configuration for the device, that is, the IP
configuration for its set of security zones (and hence Ethernet ports within the security zones). Before
configuring the IP interfaces for the device, you need to determine the deployment mode that best
meets network requirements: transparent, transparent DMZ (NAT/Routed LAN), or full-routed/NAT.
For a description of these deployment modes, see “
Deployment Modes” on page 131.
The device allows you to configure three types of IP interfaces: external, internal, and GRE. You can
only configure one external interface on each device. For device maximum configurable values, see
Appendix D‚ “Device Maximum Values”. Setting up the IP interfaces for a device is a three-step
process:
STEP 1
For each IP interface, configure the IP address information. An interface is required for every
IP subnet that is directly connected to the device. For example, you need one for the Internet
connection (external interface) and one for every directly connected network subnet (internal
interfaces).
STEP 2
For each IP interface, select the security zones that will use the configuration. Each security
zone must be associated with an internal or external IP interface.
STEP 3
If necessary, configure the interface to perform routing using the advanced configuration
options.
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