Ubuntu Ports

Ubuntu Ports

1) see the list of opened ports
```
$ netstat -ntlp | grep LISTEN
tcp        0      0 127.0.0.1:27017         0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:6379          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      -               
tcp        0      0 127.0.0.1:5433          0.0.0.0:*               LISTEN      -               
tcp6       0      0 :::9200                 :::*                    LISTEN      -               
tcp6       0      0 :::80                   :::*                    LISTEN      -               
tcp6       0      0 :::9300                 :::*                    LISTEN      -               
tcp6       0      0 ::1:631                 :::*                    LISTEN      -               
tcp6       0      0 :::443                  :::*                    LISTEN      - 
```

2) Search in opened ports:
```
$ sudo netstat -ntlp | grep :9200
tcp6       0      0 :::9200                 :::*                    LISTEN      3457/java       
$ sudo netstat -ntlp | grep :5984
$
```

3) Configure ports:
```
sudo iptables -A INPUT -p tcp -i eth0 --dport 5984 -m state --state NEW -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 5984 -j ACCEPT
```