ProSafe Gigabit 8 Port VPN Firewall FVS318G Reference Manual
Router and Network Management 7-5
1.1 November, 2009
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 “Configuring Source MAC Filtering” on page 4-24 for the procedure on how to use this
feature.
Features That Increase Traffic
Features that tend to increase WAN-side loading are as follows:
• Port forwarding
• Port triggering
• Exposed hosts
• VPN tunnels
Port Forwarding
The firewall always blocks DoS (Denial of Service) attacks. A DoS attack does not attempt to steal
data or damage your PCs, but overloads your Internet connection so you can not use it (i.e., the
service is unavailable). You can also create additional firewall rules that are customized to block
or allow specific traffic.
You can control specific inbound traffic (from WAN to LAN). Inbound Services lists all existing
rules for inbound traffic. If you have not defined any rules, only the default rule will be listed. The
default rule blocks all inbound traffic.
Each rule lets you specify the desired action for the connections covered by the rule:
• BLOCK always
• BLOCK by schedule, otherwise Allow
• ALLOW always
• ALLOW by schedule, otherwise Block
You can also enable a check on special rules:
Warning: This feature is for Advanced Administrators only! Incorrect configuration
will cause serious problems.
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