D-Link DFL-2500 - Manual (Page 311)

13.3. ICMP Level Settings
ICMPSendPerSecLimit
Specifies the maximum number of ICMP messages NetDefendOS may generate per second. This
includes ping replies, destination unreachable messages and also TCP RST packets. In other words,
this setting limits how many Rejects per second may be generated by the Reject rules in the Rules
section.
Default: 20 per second
SilentlyDropStateICMPErrors
Specifies if NetDefendOS should silently drop ICMP errors pertaining to statefully tracked open
connections. If these errors are not dropped by this setting, they are passed to the rule set for
evaulation just like any other packet.
Default: Enabled
13.3. ICMP Level Settings Chapter 13. Advanced Settings
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