Max Ping Size

PING (ICMP echo request) is a program that uses ICMP protocol to check whether a remote machine is up. A request is sent by the client, 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.

Max Ping Size Fields

In this field…	Do this…
Action	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.
Track	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.
Max Ping Size	Specify the maximum data size for ICMP echo response. The default value is 1500.

In this field…

Do this…

Action

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.

Track

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.

Max Ping Size

Specify the maximum data size for ICMP echo response.

The default value is 1500.