Comment 18 for bug 1459964

Verified on RC2

[root@nailgun ~]# ifconfig |grep enp0s3
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
[root@nailgun ~]# ifconfig enp0s3
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
        inet 10.109.10.2 netmask 255.255.255.0 broadcast 10.109.10.255
        inet6 fe80::662e:60ff:fe80:30 prefixlen 64 scopeid 0x20<link>
        ether 64:2e:60:80:00:30 txqueuelen 1000 (Ethernet)
        RX packets 4447016 bytes 2261103415 (2.1 GiB)
        RX errors 0 dropped 40 overruns 0 frame 0
        TX packets 7363406 bytes 7566236025 (7.0 GiB)
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

[root@nailgun ~]# export http_proxy=http://10.109.20.1:3128/
[root@nailgun ~]# fuel node
Can't connect to Nailgun server!
Please check connection settings in your configuration file.