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24 lines
1.1 KiB
HTML
24 lines
1.1 KiB
HTML
<header>Log Filters</header>
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A log filter defines a set of conditions that may match a log message,
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based on its facility, priority, contents, sender's hostname and source IP
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address. A filter does nothing on its own - however, when combined with
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a source and destination in a log target, it controls which messages are
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written to the destination. <p>
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This page lists all existing filters, and can be used to create new
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ones, or edit and delete those that already exist. You should be careful when
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removing or changing those that were setup by default, as they often select
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critical log messages or are important to the functioning of the system.
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However, it is quite safe to add your own filters. <p>
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Syslog-NG allows filters to be extemely complex and make use of boolean logic
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to match messages. When editing a filter, you can select to use
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a simple set of rules for choosing which of the facility, priority, contents,
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hostname and IP the filter matches on. Or you can choose to enter a Syslog-NG
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boolean expression directly, which should only be used if you are familiar
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with its configuration file format. <p>
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<footer>
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