NETGEAR UTM10EW-100NAS, UTM25-100NAS, UTM25EW-100NAS manual Features That Reduce Traffic

ProSecure Unified Threat Management UTM10 or UTM25 Reference Manual

Using the dual WAN ports in load balancing mode increases the bandwidth capacity of the WAN side of the UTM, but there is no backup in case one of the WAN ports fail. When such as failure occurs, the traffic that would have been sent on the failed WAN port is diverted to the 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 UTM 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 re covered by the rule:

•BLOCK always

•BLOCK by schedule, otherwise allow

•ALLOW always

•ALLOW by schedule, otherwise block

The section below 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 5-4. For detailed procedures on how to configure outbound rules, see “Setting LAN WAN Rules” on page 5-11and “Setting DMZ WAN Rules” on page 5-14.

10-2 Network and System Management

v1.0, September 2009