For years, enterprise-grade flow analysis was reserved for organizations with deep pockets. Today, however, robust open-source and "freemium" tools allow you to monitor network traffic with surprising depth—at zero cost.
You do not need a five-figure software budget to understand your network traffic. By leveraging free tools like for ease of use or ElastiFlow for visualization, you can gain enterprise-level visibility into your network traffic. netflow monitoring free
Enter .
ntopng is a web-based tool that is aggressively maintained. It turns your server into a flow collector with a beautiful, real-time dashboard. For years, enterprise-grade flow analysis was reserved for
: What applications (HTTP, DNS, etc.) are being used. By leveraging free tools like for ease of
*Note: ManageEngine offers a free edition that monitors up to two interfaces, which is great for a single WAN link.
Plixer’s Scrutinizer is the gold standard. The free version is not a time-limited trial; it is a perpetual free tier that allows up to (which is a lot for a small office).