How to count the number of open network connections on Linux
Apr 04, 2016, 07:00 (0 Talkback[s])
(Other stories by Xmodulo)
One of system resources to monitor closely as a system administrator is network connections. In order to maintain adequate networking performance on a server, you need to watch out for any abnormal behavior in network connections (e.g., unusually high volume of connection requests), and act on it (e.g., filter DDoS or port scanning attacks). This tutorial describes how to monitor active network connections, and how to count the number of open network connections on Linux.