Quick Reference Guide

ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336G Reference Manual
Connecting the FVS336G to the Internet 2-13
v1.0, January 2010
Configuring Auto-Rollover Mode
To use a redundant ISP link for backup purposes, ensure that the backup WAN port has already
been configured. Then select the WAN port that will act as the primary link for this mode and
configure the WAN Failure Detection Method to support Auto-Rollover.
When the VPN firewall is configured in Auto-Rollover mode, it uses the selected WAN Failure
Detection Method to check the connection of the primary link at regular intervals to detect its
routing status. Link failure is detected in one of the following ways:
• By sending DNS queries to a DNS server, or
• By sending a Ping request to an IP address, or
• None (no failure detection is performed).
From each WAN interface, DNS queries or Ping requests are sent to the specified IP address. If
replies are not received, after a specified number of retries, the corresponding WAN interface is
considered down.
To configure the dual WAN ports for Auto-Rollover:
1. Select Network Configuration > WAN Settings from the menu, and click the WAN Mode
tab. The WAN Mode screen is displayed
Figure 2-10