Netgear SRX5308 Specifications Page 243

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Network and System Management
243
ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308
Using four WAN ports in load balancing mode increases the bandwidth capacity of the WAN
side of the VPN firewall, but there is no backup in case one of the WAN ports fails. When
such a failure occurs, the traffic that would have been sent on the failed WAN port is diverted
to another WAN port that is still working, thus increasing its load. However, there is one
exception: Traffic that is bound by protocol to the WAN port that failed is not diverted.
Features That Reduce Traffic
You can adjust the following features of the VPN firewall in such a way that the traffic load on
the WAN side decreases:
LAN WAN outbound rules (also referred to as service blocking)
DMZ WAN outbound rules (also referred to as service blocking)
Content filtering
Source MAC filtering
LAN WAN Outbound Rules and DMZ WAN Outbound Rules (Service Blocking)
You can control specific outbound traffic (from LAN to WAN and from the DMZ to WAN). The
LAN WAN Rules screen and the DMZ WAN Rules screen list all existing rules for outbound
traffic. If you have not defined any rules, only the default rule is listed. The default rule allows
all outgoing traffic. Any outbound rule that you create restricts outgoing traffic and therefore
decreases the traffic load on the WAN side.
WARNING!
This feature is for advanced administrators only! Incorrect
configuration might cause serious problems.
Each rule lets you specify the desired action for the connections that are covered by the rule:
BLOCK always
BLOCK by schedule, otherwise allow
ALLOW always
ALLOW by schedule, otherwise block
The following section summarizes the various criteria that you can apply to outbound rules in
order to reduce traffic. For more information about outbound rules, see Outbound Rules
(Service Blocking) on page 83. For detailed procedures on how to configure outbound rules,
see Set LAN WAN Rules on page 91 and Set DMZ WAN Rules on page 95.
When you define outbound firewall rules, you can further refine their application according to
the following criteria:
Services. You can specify the services or applications to be covered by an outbound
rule. If the desired service or application does not appear in the list, you need to define it
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