title: docker port forward bind/dns/udp not respond
body: <p>I cant get response from anywhere but docker container specific ip or inside container.</p>
  
  <p>my firewall is disabled on virtualbox machine:</p>
  
  <pre><code>root@docker-aasaam-web-app:~# ufw status verbose
  Status: inactive
  </code></pre>
  
  <p>On docker machine test docker container ip:</p>
  
  <pre><code>root@docker-machine:~# telnet 172.17.0.3 53
  Trying 172.17.0.3...
  Connected to 172.17.0.3.
  Escape character is '^]'.
  ^]
  telnet&gt; q
  Connection closed.
  </code></pre>
  
  <p>inside container</p>
  
  <pre><code>root@014f546c2322:/# telnet 127.0.0.1 53
  Trying 127.0.0.1...
  Connected to 127.0.0.1.
  Escape character is '^]'.
  </code></pre>
  
  <p>on docker machine test local ip :</p>
  
  <pre><code>root@docker-machine:~# telnet 127.0.0.1 53
  Trying 127.0.0.1...
  telnet: Unable to connect to remote host: Connection refused
  </code></pre>
  
  <p>outside of virtualbox</p>
  
  <pre><code>sweb@sweb-laptop:~$ ping 192.168.56.160
  PING 192.168.56.160 (192.168.56.160) 56(84) bytes of data.
  64 bytes from 192.168.56.160: icmp_seq=1 ttl=64 time=0.366 ms
  ^C
  --- 192.168.56.160 ping statistics ---
  1 packets transmitted, 1 received, 0% packet loss, time 0ms
  rtt min/avg/max/mdev = 0.366/0.366/0.366/0.000 ms
  
  sweb@sweb-laptop:~$ telnet 192.168.56.160 53
  Trying 192.168.56.160...
  telnet: Unable to connect to remote host: Connection refused
  </code></pre>
  
  <p>and docker ps is :</p>
  
  <pre><code>root@docker-machine:~# docker ps
  CONTAINER ID        IMAGE                                    COMMAND                  CREATED             STATUS              PORTS                    NAMES
  dc758771ce15        exampleapp-dns:latest                        "exampleapp-start"           21 minutes ago      Up 21 minutes       0.0.0.0:53-&gt;53/udp       exampleapp-dns
  </code></pre>
  
  <p>what's the problem?</p>