Black Box WRT-300BGN-R2, Руководство пользователя

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Chapter 4: Advanced Functions
4.3.3 DoS Attack Prevention
Denial of Service (DoS) is a common attack measure. It transmits a great amount of data or requests to your Internet IP address
and server. The Internet connection will become very slow, and the server may stop responding because it can’t handle too
much traffic.
This router has a built-in DoS attack prevention mechanism; when you activate it, the router will stop the DoS attack for you.
Follow these instructions to set DoS prevention parameters:
Click on the “Firewall” menu on the left of the Web management interface, then click on “DoS.” The following message will be
displayed:
Figure 4-23. DoS screen.
Table 4-9. DoS options.
Item Description
Ping of Death (1): Ping of Death is a special packet, and it will cause certain computers to stop responding. Check
this box and the router will filter out this kind of packet.
Discard Ping Ping is a common and useful tool to know the connection status of a specified remote
From WAN (2): network device, but some malicious intruder might try to fill your network bandwidth with a
lot of ping request data packets, to slow down your Internet connection or make it unusable.
Check this box and the router will ignore all inbound ping requests; but when you activate this
function, you will not be able to ping your own router from the Internet, either.
Port Scan (3): Some malicious intruder might 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 traffic that’s trying to scan your Internet IP address.
Sync Flood (4): This is another kind of attack, which uses a lot of fake connection requests to consume the
memory of your server to try to make your server become unusable. Check this box and the
router will filter out this kind of traffic.
Advanced Settings (5): Click this button and you can set the advanced settings for the DoS prevention method listed
above.