D-Link DFL-CPG310 Product Manual - Page 247
Max Ping Size, An attacker can echo the client with a large amount of data, causing a buffer
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Using SmartDefense Max Ping Size PING (ICMP echo request) is a program that uses ICMP protocol to check whether a remote machine is up. The client sends a request, and the server responds with a reply echoing the client's data. An attacker can echo the client with a large amount of data, causing a buffer overflow. You can protect against such attacks by limiting the allowed size for ICMP echo requests. Table 40: Max Ping Size Fields In this field... Do this... Action Track Specify what action to take when an ICMP echo response exceeds the Max Ping Size threshold, by selecting one of the following: • Block. Block the request. This is the default. • None. No action. Specify whether to log ICMP echo responses that exceed the Max Ping Size threshold, by selecting one of the following: • Log. Log the responses. This is the default. • None. Do not log the responses. Chapter 9: Setting Your Security Policy 231
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