Tag: active monitoring

News

HowTo Monitor SNMP Interfaces Utilisation and Congestion Rate

Recently, we added the ability in ntopng to monitor link utilisation using NetFlow/IPFIX. In this post, we want to show you how we further improved those functionalities by leveraging SNMP to monitor the status of many devices (interfaces) simply. SNMP is a well-known protocol used for monitoring network devices, and ntopng uses it to poll and gather information from them. ntopng computes the interface usage by using a simple proportion between the traffic metered via SNMP and the interface speed. The interface speed is read by default from SNMP, but it can …
Features

How we Improved Alarm Delivery in ntopng

Sometimes, a critical issue shows up in your network and you’d like to be notified by ntopng on Telegram or by E-Mail. ntopng allows you to filter alerts for each recipient based on a few criteria including alert family, category, severity, or affected hosts. However in some case you want to be notified about a very specific alert, out of all alerts produced with the same family, category, severity. For example, it’s important to be notified when an Interface has no traffic, or when a new device (MAC) connects or …
ntopng

Active Monitoring in ntopng 4.0: ICMP, ICMPv6, HTTP and HTTPS pings with RTT

The latest stable ntopng 4.0 features a Round Trip Time (RTT) monitor which is capable of pinging hosts on a minute-by-minute basis to check: IP reachability with ICMP and ICMPv6 pings Web servers functionality with HTTP and HTTPS pings Checks account for the RTT, that is, the time it takes to reach a certain host and receive a response from it. ntopng shows all the RTT-monitored hosts under the System Interface   For each monitored host ntopng offers the following information The full URL of the monitored host. The URL …