Which Linux process is using a particular network port?

Most network related services have to open up a network socket, so they can start listening for incoming network requests. It is common to find the TCP or UDP being used as the main communication protocol. In this article, we will check what ports are used by which Linux process. Auditing processes and network services Find out what process is listening to a port Only one process can actively listen to a TCP or UDP port. We usually only discover […]

Alternative for netstat: ss tool

Alternative for netstat System administrators and security professionals searching for listening ports on a server, are definitely familiar with the netstat command. However, newer distributions do not have the tool default installed anymore. Time to start using ss besides our beloved netstat command. ss Socket statistics, or ss for short, is an easy replacement command for netstat. One way to use it, is with parameters ss -aut -a: show listening and non-listening sockets -u: show UDP -t: show TCP [root@archlinux […]