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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thanks for help! This solution helped me.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I have one more question: I send several messages that must be aggregated into one, but the context-length parameter always turns out to be increased by one. Why it happens?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:RU">From:</span></b><span lang="EN-US" style="mso-fareast-language:RU"> syslog-ng <syslog-ng-bounces@lists.balabit.hu>
<b>On Behalf Of </b>Peter Kokai (pkokai)<br>
<b>Sent:</b> Tuesday, June 11, 2019 6:14 PM<br>
<b>To:</b> </span><span style="mso-fareast-language:RU">Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu><br>
<b>Subject:</b> Re: [syslog-ng] grouping-by question<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">Hello,
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">Maybe there is a better option, but what I ended up doing in similuar case to set a new key-value and filter messages that had
that value. <br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">aggregate(
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">...
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU"> value("should-only-pass" "1")
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">...
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">)
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">and before destination add a filter to only pass messages with should-only-pass<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">--
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">kokan
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU">Get
<a href="https://aka.ms/ghei36">Outlook for Android</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:RU"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black;mso-fareast-language:RU">From:</span></b><span style="color:black;mso-fareast-language:RU"> syslog-ng <<a href="mailto:syslog-ng-bounces@lists.balabit.hu">syslog-ng-bounces@lists.balabit.hu</a>> on behalf of
Газин Максим Алексеевич <<a href="mailto:Maksim.Gazin@rt.ru">Maksim.Gazin@rt.ru</a>><br>
<b>Sent:</b> Tuesday, June 11, 2019 5:03:02 PM<br>
<b>To:</b> <a href="mailto:syslog-ng@lists.balabit.hu">syslog-ng@lists.balabit.hu</a><br>
<b>Subject:</b> [syslog-ng] grouping-by question</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:RU">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:RU"> <o:p></o:p></span></p>
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<div style="border:solid #9C6500 1.0pt;padding:2.0pt 2.0pt 2.0pt 2.0pt">
<p class="MsoNormal" style="line-height:12.0pt;background:#FFEB9C"><b><span style="font-size:10.0pt;color:#9C6500;mso-fareast-language:RU">CAUTION:</span></b><span style="font-size:10.0pt;color:black;mso-fareast-language:RU"> This email originated from outside
of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:RU"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:RU">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:RU"><o:p> </o:p></span></p>
<pre><span lang="EN-US" style="color:black">I'm new to syslog-ng, and I'm having some trouble. <o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black">I want to use syslog-ng to aggregate similar events from our firewalls. I use the grouping-by parser to create an aggregated event, but I have a question, how do I get only aggregated events on the output without source ones?<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="color:black">My configuration:<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="color:black">parser p_patterndb {<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> db-parser(file("/etc/syslog-ng/conf.d/forti.xml"));<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> };<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="color:black">log {<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> source {<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> file("/tmp/in.log" flags(no-parse));<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> };<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> parser {<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> kv_parser (prefix("forti."));<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> grouping-by(<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> key("${forti.devname}${forti.srcip}${forti.dstip}${forti.dstport}")<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> scope("process")<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> timeout(15)<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> aggregate(<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> value("MESSAGE" "aggegated devname=${forti.devname} srcip=${forti.srcip} dstip=${forti.dstip} dstport=${forti.dstport} count=$(context-length)")<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> inherit-mode("context")<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> )<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> );<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> };<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> destination {<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> file("tmp/out.log");<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> };<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="color:black"> };<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:RU"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:RU">My current output:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jun 8 08:42:27 centos7-1 <15>Jun 10 16:10:02 fw01 fw: logver=56 devname="fw01" devid=" " vd="" date=2019-06-04 time=15:53:34 logid="0000000013" type="traffic" subtype="forward" level="notice" eventtime=1559652814 srcip=172.26.104.3
srcport=62444 srcintf="ae1.2051" srcintfrole="lan" dstip=172.16.104.219 dstport=9092 dstintf="ae0.2099" dstintfrole="lan" sessionid=3465151973 proto=6 action="deny" policyid=0 policytype="policy" dstcountry="Reserved" srccountry="Reserved" trandisp="noop"
duration=0 sentbyte=0 rcvdbyte=0 sentpkt=0 appcat="unscanned" crscore=30 craction=131072 crlevel="high"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jun 8 08:42:27 centos7-1 <15>Jun 10 16:10:02 fw01 fw: logver=56 devname="-fw01" devid="" vd=" " date=2019-06-04 time=15:53:34 logid="0000000013" type="traffic" subtype="forward" level="notice" eventtime=1559652814 srcip=172.26.104.3
srcport=62444 srcintf="ae1.2051" srcintfrole="lan" dstip=172.16.104.219 dstport=9092 dstintf="ae0.2099" dstintfrole="lan" sessionid=3465151973 proto=6 action="deny" policyid=0 policytype="policy" dstcountry="Reserved" srccountry="Reserved" trandisp="noop"
duration=0 sentbyte=0 rcvdbyte=0 sentpkt=0 appcat="unscanned" crscore=30 craction=131072 crlevel="high"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">crscore=30 craction=131072 crlevel="high"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jun 8 08:42:28 centos7-1 aggegated devname=fw01 srcip=172.26.104.3 dstip=172.16.104.219 dstport=9092 count=3<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What I want:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Jun 8 08:42:28 centos7-1 aggegated devname=fw01 srcip=172.26.104.3 dstip=172.16.104.219 dstport=9092 count=3<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any guidance would be very much appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Maxim Gazin | Senior security engineer | Rostelecom<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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