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Alvin Lucillo

List all established TCP connections

/ 2 min read

linux, k8s

To determine established connections with etcd api, use the command below with -a for all connections, -n to show all addresses/numbers, and -p to list process names.

netstat -anp | grep etcd
tcp        0      0 127.0.0.1:2379          0.0.0.0:*               LISTEN      2675/etcd
tcp        0      0 127.0.0.1:2381          0.0.0.0:*               LISTEN      2675/etcd
tcp        0      0 192.168.60.168:2380     0.0.0.0:*               LISTEN      2675/etcd
tcp        0      0 192.168.60.168:2379     0.0.0.0:*               LISTEN      2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51128         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51582         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51122         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51146         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51314         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51462         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51252         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51268         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51234         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51298         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51408         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51556         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51410         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51476         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51516         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51400         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51374         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51190         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51382         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51610         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51296         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51242         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51118         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51434         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51220         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51132         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51428         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51164         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51356         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51346         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51206         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51416         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51038         ESTABLISHED 2675/etcd
tcp        0      0 127.0.0.1:2379          127.0.0.1:51050         ESTABLISHED 2675/etcd