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<p class="MsoNormal" style="background:white;vertical-align:baseline"><span style="font-size:13.5pt;font-family:"Arial",sans-serif;color:#878A8C"><img width="1" height="1" style="width:.0104in;height:.0104in" id="Picture_x0020_1" src="cid:image001.png@01D4EB8B.1BD08960" alt="https://www.redditstatic.com/desktop2x/img/renderTimingPixel.png"></span><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">Disclaimer:
I'm not an expert in either Linux or syslog-ng. I'm also not a programmer :).<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B"><o:p> </o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">That being said, I've built a syslog-ng --> Splunk deployment and I'm trying to drop unwanted log messages before they make their way to Splunk... so drop them at syslog-ng. There are
going to be approx. 700 devices logging to this deployment (routers, switches, firewalls, IPAM, AAA, etc..) so I need to make sure whatever I do can scale easily and my teammates can help me manage it.<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B"><o:p> </o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">I'm trying to drop messages that are similar to the below:<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">Apr 5 06:02:17 x.x.x.x 2019 Apr 5 06:02:17 EDT: %USER-3-SYSTEM_MSG: NTP Receive dropping message: Received NTP control mode packet. Drop count:4200 - ntpd<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">As well as:<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">Apr 5 08:03:49 x.x.x.x Apr 5 2019 12:03:48.895 UTC: %SNMP-3-RESPONSE_DELAYED: processing GetNext of entPhysicalEntry.2.1065 (5739 msecs)<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B"><o:p> </o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">Two different devices. I've tried literally dozens of methods, my latest is below and I can't figure out why we’re still logging these messages:<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B"><o:p> </o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">filter f_trash { match(SNMP-3-RESPONSE_DELAYED value(MSGHDR)); and<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">match(NTP Receive dropping message value(MSG))};<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">log { source(s_sys); filter(f_trash); flags (final);};<o:p></o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B"><o:p> </o:p></span></p>
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<span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#1A1A1B">Any help / constructive criticism would be greatly appreciated.<o:p></o:p></span></p>
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