NETFLOW 与 SNMP两种不同的网络监控方法 wmi

vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network traffic for the selected interface(s). It uses the network interface statistics provided by the kernel as information source. This means that vnStat won't actually be sniffing any traffic and also ensures light use of system resources regardless of network traffic rate. (opens new window)

SNMP and Syslog https://geek-docs.com/network/network-ask-answer/snmp-and-syslog.html