# netstat -a | grep "LISTEN"
tcp        0      0 localhost:mysql         *:*                     LISTEN     
tcp        0      0 *:www                   *:*                     LISTEN     
tcp        0      0 localhost:3000          *:*                     LISTEN     
tcp6       0      0 [::]:ssh                [::]:*                  LISTEN     
tcp6       0      0 ::1%112556661:3000      [::]:*                  LISTEN     
unix  2      [ ACC ]     STREAM     LISTENING     5665     /var/run/mysqld/mysqld.sock


# telnet 0.0.0.0 3000 
Trying 0.0.0.0...
Connected to 0.0.0.0.
Escape character is '^]'.
sdf
Connection closed by foreign host.
root@socialmoth:~#