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browser: 
Here are descriptions of each setup item: 
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 this kind of packet out. 
Discard Ping 
Ping is a common and useful tool to know 
From WAN (2): 
the connection status of a specified remote network 
device, but some malicious intruders will try to fill your 
network bandwidth with a lot of PING request data 
packets to make your internet connection become very 
slow, even 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 Internet either). 
Port Scan (3): 
Some malicious intruder may 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 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 and try to make your server become unusable. 
Check this box and the router will filter out this kind of 
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