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POInetAddress.getLocalHost().getHostAddress() is returning 127.0.1.1
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  1. POInetAddress.getLocalHost().getHostAddress() is returning 127.0.1.1
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    copied!<p>My question is similar to <a href="https://stackoverflow.com/q/2381316/1175065">this</a> question . I want to get the real IP of my machine (not 127.0.0.1) but strange, the below code in my Ubuntu is returning 127.0.1.1</p> <pre><code>InetAddress.getLocalHost().getHostAddress() </code></pre> <p>Below is my complete code, originally posted in SO at <a href="https://stackoverflow.com/a/7334091/1175065">here</a></p> <pre><code>public String getMachineIP() { try { String hostIP = InetAddress.getLocalHost().getHostAddress(); if (!hostIP.equals("127.0.0.1")) { return hostIP; } /* * Above method often returns "127.0.0.1", In this case we need to * check all the available network interfaces */ Enumeration&lt;NetworkInterface&gt; nInterfaces = NetworkInterface .getNetworkInterfaces(); while (nInterfaces.hasMoreElements()) { Enumeration&lt;InetAddress&gt; inetAddresses = nInterfaces .nextElement().getInetAddresses(); while (inetAddresses.hasMoreElements()) { String address = inetAddresses.nextElement() .getHostAddress(); if (!address.equals("127.0.0.1")) { return address; } } } } catch (UnknownHostException e1) { System.err.println("Error = " + e1.getMessage()); } catch (SocketException e1) { System.err.println("Error = " + e1.getMessage()); } return null; } </code></pre> <p>The above code is returning 127.0.1.1 whereas <code>ifconfig</code> on my Ubuntu machine is giving below output</p> <pre><code>root@dell:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:21:70:b7:30:cd UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:28 Base address:0x6000 eth1 Link encap:Ethernet HWaddr 00:22:68:d3:02:b5 inet addr:192.168.2.112 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::222:68ff:fed3:2b5/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:23827 errors:0 dropped:0 overruns:0 frame:32515 TX packets:23200 errors:46 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:22027719 (22.0 MB) TX bytes:3778268 (3.7 MB) Interrupt:19 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:402 errors:0 dropped:0 overruns:0 frame:0 TX packets:402 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:29197 (29.1 KB) TX bytes:29197 (29.1 KB) </code></pre> <p>I found 127.0.1.1 entry in host file (Strange to me, since I never updated this file)</p> <pre><code>root@dell:~# cat /etc/hosts 127.0.0.1 localhost 127.0.1.1 dell # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts </code></pre> <p>How to get the real IP of my machine (not 127.0.0.1)? I am looking ONLY for IPv4 address excluding <code>127.0.0.0/8 subnet</code></p>
 

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