netstat -tulpnc

showing opened ports on machine

shows opened ports on machine in continuous mode (refreshing every 10 sec)
Sample Output
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6010          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6011          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6012          0.0.0.0:*               LISTEN      -
tcp        0      0 :::111                  :::*                    LISTEN      -
tcp        0      0 :::5556                 :::*                    LISTEN      20921/java
tcp        0      0 :::22                   :::*                    LISTEN      -
tcp        0      0 ::1:631                 :::*                    LISTEN      -
tcp        0      0 127.0.0.2:7001          :::*                    LISTEN      20842/java
tcp        0      0 127.0.0.1:7001          :::*                    LISTEN      20842/java
tcp        0      0 10.249.135.171:7001     :::*                    LISTEN      20842/java
tcp        0      0 ::1:7001                :::*                    LISTEN      20842/java
tcp        0      0 fe80::7a2b:cbff:fe:7001 :::*                    LISTEN      20842/java
tcp        0      0 ::1:25                  :::*                    LISTEN      -
tcp        0      0 ::1:6010                :::*                    LISTEN      -
tcp        0      0 ::1:6011                :::*                    LISTEN      -
tcp        0      0 ::1:6012                :::*                    LISTEN      -
udp        0      0 0.0.0.0:111             0.0.0.0:*                           -
udp        0      0 0.0.0.0:631             0.0.0.0:*                           -
udp        0      0 0.0.0.0:670             0.0.0.0:*                           -
udp        0      0 0.0.0.0:26791           0.0.0.0:*                           -
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           -
udp        0      0 0.0.0.0:39640           0.0.0.0:*                           -
udp        0      0 :::111                  :::*                                -
udp        0      0 :::546                  :::*                                -
udp        0      0 :::670                  :::*                                -
udp        0      0 :::43339                :::*                                -
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6010          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6011          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6012          0.0.0.0:*               LISTEN      -
tcp        0      0 :::111                  :::*                    LISTEN      -
tcp        0      0 :::5556                 :::*                    LISTEN      20921/java
tcp        0      0 :::22                   :::*                    LISTEN      -
tcp        0      0 ::1:631                 :::*                    LISTEN      -
tcp        0      0 127.0.0.2:7001          :::*                    LISTEN      20842/java
tcp        0      0 127.0.0.1:7001          :::*                    LISTEN      20842/java
tcp        0      0 10.249.135.171:7001     :::*                    LISTEN      20842/java
tcp        0      0 ::1:7001                :::*                    LISTEN      20842/java
tcp        0      0 fe80::7a2b:cbff:fe:7001 :::*                    LISTEN      20842/java
tcp        0      0 ::1:25                  :::*                    LISTEN      -
tcp        0      0 ::1:6010                :::*                    LISTEN      -
tcp        0      0 ::1:6011                :::*                    LISTEN      -
tcp        0      0 ::1:6012                :::*                    LISTEN      -
udp        0      0 0.0.0.0:111             0.0.0.0:*                           -
udp        0      0 0.0.0.0:631             0.0.0.0:*                           -
udp        0      0 0.0.0.0:670             0.0.0.0:*                           -
udp        0      0 0.0.0.0:26791           0.0.0.0:*                           -
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           -
udp        0      0 0.0.0.0:39640           0.0.0.0:*                           -
udp        0      0 :::111                  :::*                                -
udp        0      0 :::546                  :::*                                -
udp        0      0 :::670                  :::*                                -
udp        0      0 :::43339                :::*                                -

0
By: altern
2011-04-20 07:30:31

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What Others Think

The ss command is the proper iproute2 way to do this.
kenyon · 367 weeks and 3 days ago

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