title: I can SSH/HTTP to my server but can't ping it
body: <p>I had a Raspberry Pi set up as a web server on my home DSL line. Everything was fine. Recently i sent my Pi to a friend because he had a better connection that i could use. I got the static internal ip, DMZ set up. Everything works fine as far as i can see but i can't ping the server, although i can reach the site and mumble server that i host on it. I use duckdns to resolve his dynamic ip, i tried pinging the ip address directly but that didnt work either. My iptables configurations are nonexistent, iptables -L doesn't show any rules set. I didn't need them when Pi was at my house, simply setting it as a DMZ server was enough. I checked the firewall settings of my friends router and it is not enabled. I am no expert in networking or server management, so i dont know which information i should provide in order you to come up with a solution. If anybody asks for something in particular, i will edit it in. Thank you all in advance.</p>
  
  <p>Hardware: Raspberry Pi 2<br>
  OS: Raspbian</p>
  
  <p>My /etc/network/interfaces file(which i used to set the static ip)   </p>
  
  <pre><code>auto lo
  iface lo inet loopback
  auto eth0
  iface eth0 inet static
  address 192.168.0.44
  gateway 192.168.0.1
  netmask 255.255.255.0
  network 192.168.0.0
  broadcast 192.168.0.255
  allow-hotplug wlan0
  iface wlan0 inet manual
  wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
  iface default inet dhcp
  </code></pre>