User's Manual

MG7310 Cable Modem User Manual
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5.5.1 Firewall Basic
Choose Protection & Parental Control> Firewall Basic to display the following
page.
Figure 36 Firewall Basic configuration
This page is used to block or exclusively allow different types of data through the
CM/RG from the WAN to the LAN.
The “low” setting does not block any services/ports, however it does protect against
invalid packets and well known attacks. The “medium” setting will cause the firewall to
drop a packet unless it is on a specific port of allowed services; the allowed services
are listed on the same page. The “high” setting is similar to “medium”, but allows
access to even fewer services. The “off” setting allows all traffic to pass.
Block Fragmented IP packets prevent all fragmented IP packets from passing through
the firewall. Port Scan Detection detects and blocks port scan activity originating on
both the LAN and WAN. IP Flood Detection detects and blocks packet floods
originating on both the LAN and WAN. The Save button must be clicked in order to
activate any of the checkbox items. All of these settings can be activated on-the-fly
without a CM/RG reboot.