D-Link NetDefendOS User Manual page 876

fixed value for some specific issues.
If NetDefendOS is upgraded, Dynamic High Buffers should be enabled since the
memory requirements of a new version may change and NetDefendOS should be
allowed to allocate the required memory automatically. Support personnel might still
recommend using a fixed value after the upgrade.
Max Pipe Users
The maximum number of pipe users to allocate. As pipe users are only tracked for a 20th of a
second, this number usually does not need to be anywhere near the number of actual users, or
the number of statefully tracked connections. If there are no configured pipes, no pipe users will
be allocated, regardless of this setting. For more information about pipes and pipe users, see
Section 10.1, "Traffic Shaping".
Default: 512
Application Control Memory Optimization Level
This specifies the percentage of total fee NetDefendOS memory when application control will
optimize memory by freeing up space. This feature is disabled if the setting has a value of zero.
Only in unusual circumstances will application control use up a high level of total system
memory. This setting puts a maximum limit of how much memory can be used. When this
maximum is reached, the application control subsystem will restart and clear all its memory
usage. When this occurs, no traffic connections will not be dropped but application control will
not be applied during the restart period.
This setting can be raised to a higher value if these restarts are occurring too often. Each restart
will generate a log message with the event name appctl_memory_optimized.
Default: 5
Anti-Virus Cache Lifetime
This specifies the lifetime in minutes of entires in the anti-virus cache. This setting is explained
further in Section 6.5.5, "The Anti-Virus Cache".
Default: 20
WCF Performance Log
This enables or disables the performance log for dynamic web content filtering. This is described
in detail Section 6.3.4.6, "The WCF Performance Log".
Default: Disabled
Allow IP Rules
This enables or disables the usage of IP rules in NetDefendOS. When disabled, only IP Policy
objects can be configured in IP rule sets. Existing IP Rule objects will not be affected when this
setting is disabled.
Default: Disabled
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Chapter 13: Advanced Settings