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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I agree with you.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>The tool doesn’t really matter. Windows, linux, cloud or not.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>It’s really important to first understand what are you trying to solve or improve?<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>If this step is forgotten, then it will just be another tool to support to add in your long list of useless tools.<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>My personal favorites are a mix of:<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span style='mso-fareast-language:EN-US'>Ntop with PF_RING enabled.<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span style='mso-fareast-language:EN-US'>Nfdump<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span style='mso-fareast-language:EN-US'>Elasticsearch <o:p></o:p></span></li></ul><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I’m sure all the other tools are also very good. Csv in excel or grep/awk could also work if you know exactly what you’re looking for. </span><span style='font-family:"Segoe UI Emoji",sans-serif;mso-fareast-language:EN-US'>😉</span><span style='mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Jean<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> NANOG <nanog-bounces+jean=ddostest.me@nanog.org> <b>On Behalf Of </b>Christopher Morrow<br><b>Sent:</b> January 25, 2022 12:38 PM<br><b>To:</b> David Bass <davidbass570@gmail.com><br><b>Cc:</b> <nanog@nanog.org> <nanog@nanog.org><br><b>Subject:</b> Re: Flow collection and analysis<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Tue, Jan 25, 2022 at 10:53 AM David Bass <<a href="mailto:davidbass570@gmail.com">davidbass570@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal>Wondering what others in the small to medium sized networks out there are using these days for netflow data collection, and your opinion on the tool?<o:p></o:p></p></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>a question not asked, and answer not provided here, is:<br> "What are you actually trying to do with the netflow?"<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Answers of the form:<br> "Dos detection and mitigation planning"<br> "Discover peering options/opportunities"<br> "billing customers"<o:p></o:p></p></div><div><p class=MsoNormal> "traffic analysis for future network planning"<o:p></o:p></p></div><div><p class=MsoNormal> "abuse monitoring/management/investigations"<o:p></o:p></p></div><div><p class=MsoNormal> "pretty noc graphs"<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>are helpful.. I'm sure other answers would as well.. but: "how do you collect?" is "with a collector" and isn't super helpful if the collector can't feed into the tooling / infrastructure / long-term goal you have.<o:p></o:p></p></div></div></div></div></body></html>