HP-UX IPFilter Version A.03.05.14 Administrator's Guide

Dynamic Connection Allocation
DCA Keywords
Chapter 3 51
In the example summary log, the source IP address displayed is actually
the IP address range specified in the rule. Wildcard IP addresses are
shown as 0.0.0.0. The destination port information is also printed from
the rule. The other fields are similar to a non-cumulative summary
record.
For further information, see “ipmon and DCA Logging” on page 95.
log limit freq: Log Frequency
Use the log limit freq <num> keyword to control the frequency at
which alert log records are logged.
For example, log limit is set to 10 and log limit freq is set to 3. The
system begins tracking exceeded connections at the eleventh connection.
It logs every third exceeded connection, that is the fourteenth,
seventeenth, twentieth, and so on.
The log limit freq keyword can also be used with keep limit
cumulative rules. For example:
pass in log limit freq 5 quick proto tcp from 18.9.90.0/24 to
any keep limit 10 cumulative
In the previous rule, log limit freq 5 specifies that the log records
should be printed for every five connections that exceeds the connection
limit of 10. If 100 connections came in, it logs the eleventh, sixteenth,
twenty-first, and so on.
Cumulative limits are shared by different IP addresses and it is possible
that connections from some source IPs will not display. For example, the
initial connections might come from IP1 and the next 10 from IP2. IP1
will not be logged, but IP2 will be logged, as one of its connections will be
the eleventh connection.