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ProSecure Unified Threat Management (UTM) Appliance Reference Manual
3-14 Manually Configuring Internet and WAN Settings
v1.0, January 2010
3. Click Apply to save your settings.
When a rollover occurs, you can configure the UTM to generate a notification e-mail to a specified
address (see “Configuring and Activating System, E-mail, and Syslog Logs” on page 11-6). When
the UTM detects that the failed primary WAN interface has been restored, an automatic rollover to
the primary WAN interface occurs.
Configuring Load Balancing and Optional Protocol Binding
(Dual-WAN Port Models Only)
For the dual-WAN port models only, to use multiple ISP links simultaneously, configure load
balancing. In load balancing mode, either WAN port carries any outbound protocol unless protocol
binding is configured.
When a protocol is bound to a particular WAN port, all outgoing traffic of that protocol is directed
to the bound WAN port. For example, if the HTTPS protocol is bound to the WAN1 port and the
FTP protocol is bound to the WAN2 port, then the UTM automatically routes all outbound HTTPS
traffic from the computers on the LAN through the WAN1 port. All outbound FTP traffic is routed
through the WAN2 port.
Protocol binding addresses two issues:
• Segregation of traffic between links that are not of the same speed.
High volume traffic can be routed through the WAN port connected to a high speed link and
low volume traffic can be routed through the WAN port connected to the low speed link.
• Continuity of source IP address for secure connections.
Some services, particularly HTTPS, cease to respond when a client’s source IP address
changes shortly after a session has been established.
To configure the dual-WAN ports for load balancing mode with optional protocol binding:
1. Select Network Config > WAN Settings from the menu, then click the WAN Mode tab. The
WAN Mode screen displays (see Figure 3-8 on page 3-12).
2. Select the Load Balancing radio button.
3. Optional: Next to the Load Balancing radio button, click the view protocol bindings button.
The WAN1 Protocol Bindings screen displays (see Figure 3-9 on page 3-15). (The Web
Management Interface path to this screen is Network Config > Protocol Bindings.)
Note: The default time to roll over after the primary WAN interface fails is
2 minutes; a 30-second minimum test period for a minimum of 4 tests.