The fourth and fifth columns show the source and destination sockets of each connection. The first column shows the TCP state, while the second and third column display the amount of data that is currently queued for reception and transmission. Others (obscured here for privacy reasons) are shown in their numeric form. http on 80, mysql on 3306) are indicated by their respective names. Example 1: Showing ALL TCP ports (sockets) that are open on our serverĪll services running on their default ports (i.e. However, in this article we will focus on the information related to network security only. In addition, it is listed in man netstat as replacement for netstat, which is obsolete. Ss is used to dump socket statistics and shows information similar to netstat, though it can display more TCP and state information than other tools.
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