Features That Increase Traffic - NETGEAR UTM9S Reference Manual

ProSecure Unified Threat Management (UTM) Appliance
- Web object blocking. You can block the following web component types: embedded
objects (ActiveX, Java, Flash), proxies, and cookies; and you can disable
JavaScripts. For more information, see
- Setting the size of Web files to be scanned. Scanning large web files requires
network resources and might slow down traffic. You can specify the maximum size of
the files that are scanned, and if files that exceed the maximum size are skipped
(which might compromise security) or blocked. For more information, see
Web Malware Scans
For these features (with the exception of web object blocking and setting the size of files
to be scanned), you can set schedules to specify when web content is filtered (see
Configure Web Content Filtering
Set Web Access Exception Rules
Source MAC Filtering
If you want to reduce outgoing traffic by preventing Internet access by certain PCs on the
LAN, you can use the source MAC filtering feature to drop the traffic received from the PCs
with the specified MAC addresses. By default, this feature is disabled; all traffic received from
PCs with any MAC address is allowed. See
procedure on how to use this feature.

Features That Increase Traffic

The following features of the UTM tend to increase the traffic load on the WAN side:
• LAN WAN inbound rules (also referred to as port forwarding)
• DMZ WAN inbound rules (also referred to as port forwarding)
• Port triggering
• Enabling the DMZ port
• Configuring exposed hosts
• Configuring VPN tunnels
LAN WAN Inbound Rules and DMZ WAN Inbound Rules (Port Forwarding)
The LAN WAN Rules screen and the DMZ WAN Rules screen list all existing rules for
inbound traffic (from WAN to LAN and from WAN to the DMZ). If you have not defined any
rules, only the default rule is listed. The default rule blocks all access from outside except
responses to requests from the LAN side. Any inbound rule that you create allows additional
incoming traffic and therefore increases the traffic load on the WAN side.
WARNING!
This feature is for advanced administrators. Incorrect
configuration might cause serious problems.
Configure Web Content Filtering
on page 197.
on page 199), and configure exceptions for groups (see
on page 221).
Enable Source MAC Filtering
Network and System Management
393
on page 199.
Configure
on page 164 for the