ntopng uses partitioned MySQL tables when storing flows. As MySQL needs a file handle for each partition and its index, it is important to make sure that the open_files_limit is large enough to allow the process to keep all these files open. Typically, open_files_limit default value works out-of-the-box but there are some packages/distributions that keeps this […]
Announcing ntopng 2.4: Efficiency is Beauty
At ntop we are on a mission to develop enterprise-grade networking software, mostly open-source, and free of charge for no-profit/research organizations. Since our inception, we have been passionately and resiliently developing software to allow our users to monitor, protect, and preserve their network infrastructure. And we have been doing this in a relentless pursuit for the best and […]
Tweaking MySQL to Improve ntopng Flows Storage Space Usage
Edit: MySQL tables engine has been migrated to MyISAM in ntopng 2.4 so this post only applies for versions <= 2.3. This is the first post that tries to give hints on how to tweak MySQL settings to better accomodate flows exported by ntopng. In particular, in this post it is discussed how to improve […]
Exploring Historical Data Using ntopng: Part 2
ntopng is able to deliver monitored traffic flows data to a MySQL server. We have already discussed how to configure ntopng to deliver this data in another blog post. In this article we discuss the new features that allow you to dig deep into the flows dumped to MySQL using the ntopng web GUI. Earlier ntopng […]
Ntopng Integration with Nagios
Discontinuation Notice This post becomes obsolete effective with ntopng 4.1+. Full discontinuation notice available here. This tutorial shows how to properly configure nagios and ntopng (Professional) in order to send asynchronous ntopng-generated alerts to nagios. Prerequisites It is assumed that the following software is already installed and properly configured: nagios daemon nagios NSCA (Nagios Service Check Acceptor) […]