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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Thanks, that explains a lot. I was having both of those issues yesterday. Everything was going to /dev/null, not just the messages I assumed were being accepted
by the first log path. I see why now. Also, when I was trying to use embedded log paths instead of if/else everything was being accepted by the top-level log path regardless. The messages going to /dev/null are just some firewall messages that we are not
concerned with and that would fill up our disk space very quickly if they aren’t filtered out.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Mark<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> syslog-ng <syslog-ng-bounces@lists.balabit.hu>
<b>On Behalf Of </b>Péter, Kókai<br>
<b>Sent:</b> Wednesday, March 27, 2019 1:58 AM<br>
<b>To:</b> Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu><br>
<b>Subject:</b> Re: [syslog-ng] Filtering out messages before any other action<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hello,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Without the other part - where you do not expect the message to be received, and its connection to this logpath it is kinda hard to say much.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Logpath on the same level:<o:p></o:p></p>
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<p class="MsoNormal">log {<o:p></o:p></p>
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<p class="MsoNormal"> filter { message("boo"); };<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> flags(final);<o:p></o:p></p>
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<p class="MsoNormal">};<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">log {<o:p></o:p></p>
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<p class="MsoNormal"> flags(final);<o:p></o:p></p>
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<p class="MsoNormal">};<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In this case if the first logpath "accepts" the message ( filter matches in this example ), the other logpath never going to see the message. Otherwise it will.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">But if you use *if* in the first logpath:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">log {<o:p></o:p></p>
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<p class="MsoNormal"> if {<o:p></o:p></p>
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<p class="MsoNormal"> filter { message("boo"); };<o:p></o:p></p>
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<p class="MsoNormal"> };<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> flags(final);<o:p></o:p></p>
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<p class="MsoNormal">};<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It does not matter if the *filter* matches or not, as either way the logpath "accepts" the log, so other logpath (not speaking about embedded logapths) won't see the message.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If you use embedded logpath:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><br>
log {<o:p></o:p></p>
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<p class="MsoNormal"> if {<o:p></o:p></p>
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<p class="MsoNormal"> filter { message("boo"); };<o:p></o:p></p>
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<p class="MsoNormal"> };<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> log {<o:p></o:p></p>
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<p class="MsoNormal"> #inner path<o:p></o:p></p>
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<p class="MsoNormal"> };<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"> flags(final);<o:p></o:p></p>
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<p class="MsoNormal">};<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Despite the result of the previous *if* the inner logpath is going to get the message.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Do you have a specific use case to *drop* the message via writing it into "/dev/null" ?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">--<o:p></o:p></p>
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<p class="MsoNormal">Kokan<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Mar 26, 2019 at 2:14 PM Faine, Mark R. (MSFC-IS40)[NICS] <<a href="mailto:mark.faine@nasa.gov" target="_blank">mark.faine@nasa.gov</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have the following as the first log path in my configuration, however, My understanding is that this should match any message with the text 'type=traffic' AND any of the listed policyid=## or a message with
the text 'action=timeout'. Flags(final) indicates that it should not be further processed by any other log path. However, I'm still seeing messages that should be discarded, am I doing something wrong?
<br>
<br>
log {<br>
if {<br>
filter { message('type=traffic') };<br>
filter {<br>
(<br>
message('policyid=35 ') or<br>
message('policyid=37 ') or<br>
message('policyid=38 ') or<br>
message('policyid=40_D ') or<br>
message('policyid=5 ') or<br>
message('policyid=10 ') or<br>
message('policyid=12 ') or<br>
message('policyid=50 ') or<br>
message('policyid=3 ') or<br>
message('action=timeout ') <br>
)<br>
};<br>
destination {<br>
file("/dev/null");<br>
};<br>
};<br>
flags(final);<br>
};<br>
<br>
Thanks,<br>
-Mark<br>
______________________________________________________________________________<br>
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</blockquote>
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