User's Manual

SR804N Cable Modem User Manual
31
Figure 27 Basic configuration
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 prevents 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 Apply 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 CMRG reboot.
5.4.2 Local Log
Choose Firewall > Local Log to display the following page.