Backup Connection Using The Untrusted Ethernet Port In Screenos Devices - Juniper NETWORK AND SECURITY MANAGER 2010.4 - CONFIGURING SCREENOS DEVICES GUIDE REV 01 Manual

Configuring ScreenOS Devices Guide
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Backup Connection Using the Untrusted Ethernet Port in ScreenOS Devices

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92
Backup Connection Using the Untrusted Ethernet Port in ScreenOS Devices on page 92
Example: Configuring NetScreen5GT Devices to Permit Internal Hosts (NSM Procedure)
on page 93
When using ADSL, the adsl1 interface serves as the primary connection to the Internet.
However, you can configure a backup connection to the Internet using the Untrusted
Ethernet port or the Modem port on the security device.
NOTE: You can configure only one backup interface.
To configure the backup interface, bind both the adsl1 and backup interface to the Untrust
zone to automatically configure the interface failover. If the ADSL interface becomes
unavailable, the security device automatically sends outgoing traffic to the backup
interface, which connects to the ISP account. When the ADSL interface is again available,
the device automatically sends outgoing traffic to the adsl1 interface.
To configure the serial interface for the modem, you must have the following information:
Login and password for the account to the dialup service provider
NOTE: All passwords handled by NSM are case-sensitive.
Primary phone connection for dialing into the account
Modem initialization string
For more information about configuring the serial interface on a security device, see the
" Interface Redundancy" chapter in the " High Availability" volume of the Concepts &
Examples ScreenOS Reference Guide.
For details on configuring the modem and ISP settings for the serial interface in NSM,
see "Example: Configuring Modem Connections (NSM Procedure)" on page 142.
Example: Configuring NetScreen5GT Devices to Permit Internal Hosts (NSM Procedure)
on page 93
Example: Configuring NetScreen5GT Devices to Connect to the Web Using the PPPoA
and ADSL Interfaces (NSM Procedure) on page 94
Example: Configuring NetScreen5GT Devices as a Firewall Using the PPPoE and ADSL
Interfaces (NSM Procedure) on page 96
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