Dos Attack Prevention - NetComm NP740n User Manual

3-3-3 DoS Attack Prevention

Denial of Service (DoS) is a common attack measure, by transmitting a great amount of data or request to
your Internet IP address and server, the Internet connection will become very slow, and server may stop
responding because it is not capable to handle too much traffics.
This router has a built-in DoS attack prevention mechanism; when you activate it, the router will stop the DoS
attack for you. Please follow the following instructions to set DoS prevention parameters:
Please click 'Firewall' menu on the left of web management interface, then click 'DoS', and the following
message will be displayed on your web browser:
Here are descriptions of every setup items:
Ping of Death:
Ping of Death is a special packet, and it will cause certain computer to stop responding. Check this
box and the router will filter this kind of packet out.
Discard Ping From
Ping is a common and useful tool to know the connection status of a specified remote network device,
WAN:
but some malicious intruder will try to fill your network bandwidth with a lot of PING request data
packet, to make your internet connection become very slow, even unusable. Check this box and the
router will ignore all inbound PING request, but when you activate this function, you will not be able to
ping your own router from internet, too.
Port Scan: Some malicious intruder will try to use a 'port scanner' to know how many ports of your Internet IP
address are open, and they can collect a lot of valuable information by doing so. Check this box and
the router will block all traffics which are trying to scan your Internet IP address.
Sync Flood:
This is another kind of attack, which uses a lot of fake connection request to consume the memory of
your server, and try to make your server become unusable. Check this box and the router will filter this
kind of traffic out.
Advanced
Click this button and you can set advanced settings of the DoS prevention method listed above, please
Settings:
see section 3-3-3-1 'DoS – Advanced Settings' below.
After you finish with all settings, please click 'Apply' button, and the following message will be displayed on
your web browser:
Please click 'Continue' to back to previous setup menu; to continue on other setup procedures, or click 'Apply'
to reboot the router so the settings will take effect (Please wait for about 50 seconds while router is rebooting).
If you want to reset all settings in this page back to previously-saved value, please click 'Cancel' button.
NP740N 11n Wireless Router
70
YML887
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