I have a host machine Ubuntu Mate 16.04.My vbox guest is Ubuntu server 16.04 with a clone.I also have a clone of the guest that it can connect to internet but the original guest can't (apt-get update gives errors)!I searched the last 7 days for a solution but couldn't find anything!Actions I did on my problematic guest:enabled NAT, Host-only, Bridge networkingfollowed this linkso now I have:magellan@g3site001:~$ sudo cat /etc/network/interfaces# This file describes the network interfaces available on your system# and how to activate them. For more information, see interfaces(5).source /etc/network/interfaces.d/*# The loopback network interfaceauto loiface lo inet loopback# The primary network interface#auto enp0s3#iface enp0s3 inet dhcpiface enp0s3 inet staticaddress 192.168.56.101netmask 255.255.255.0gateway 192.168.56.1dns-nameservers 8.8.8.8dns-nameservers 192.168.1.1and    magellan@g3site001:~$ ifconfig    enp0s3    Link encap:Ethernet  HWaddr 08:00:27:4b:16:87                inet addr:192.168.56.101  Bcast:192.168.56.255 Mask:255.255.255.0              inet6 addr: fe80::a00:27ff:fe4b:1687/64 Scope:Link              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1              RX packets:41 errors:0 dropped:0 overruns:0 frame:0              TX packets:63 errors:0 dropped:0 overruns:0 carrier:0              collisions:0 txqueuelen:1000               RX bytes:5925 (5.9 KB)  TX bytes:8067 (8.0 KB)    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:65536  Metric:1              RX packets:18 errors:0 dropped:0 overruns:0 frame:0              TX packets:18 errors:0 dropped:0 overruns:0 carrier:0              collisions:0 txqueuelen:1               RX bytes:1625 (1.6 KB)  TX bytes:1625 (1.6 KB)[/code]In another forum told me to show them VBoxManage showvminfo Ubuntu Server 64bits 16.04.1 LTS --details, the interesting part is this:NIC 1:           MAC: 0800274B1687, Attachment: Host-only Interface   'vboxnet0', Cable connected: on, Trace: off (file: none), Type: 82543GC,    Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: deny, Bandwidth   group: noneNIC 2:           MAC: 080027ADC7BD, Attachment: Bridged Interface 'eno1', Cable connected: on, Trace: off (file: none), Type: 82543GC, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: deny, Bandwidth group: noneNIC 3:           MAC: 080027A79F32, Attachment: NAT Network 'NatNetwork', Cable connected: on, Trace: off (file: none), Type: 82543GC, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: allow-all, Bandwidth group: noneNIC 4:           disabledNIC 5:           disabledNIC 6:           disabledNIC 7:           disabledNIC 8:           disabledThe working clone has a different interface although I configured all 3 cards like in the one with problems(!):It's apparent that I can't ssh to my clone and copy output to the forum!To make a recap: in the one I can ssh, in the other I can connect with the internet but not both to each and every one. Is there a solution to this mess?I forgot to give my ifconfig for my host:cent@cent:~/ubs$ ifconfigeno1      Link encap:Ethernet  HWaddr 5c:26:0a:5f:f9:f0            inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0          inet6 addr: fe80::834e:38d7:f70a:5e51/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:444390 errors:0 dropped:0 overruns:0 frame:0          TX packets:415466 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000           RX bytes:377917848 (377.9 MB)  TX bytes:81083474 (81.0 MB)          Interrupt:20 Memory:e2e00000-e2e20000 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:65536  Metric:1          RX packets:39175 errors:0 dropped:0 overruns:0 frame:0          TX packets:39175 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1           RX bytes:5557394 (5.5 MB)  TX bytes:5557394 (5.5 MB)vboxnet0  Link encap:Ethernet  HWaddr 0a:00:27:00:00:00            inet addr:192.168.56.1  Bcast:192.168.56.255  Mask:255.255.255.0          inet6 addr: fe80::800:27ff:fe00:0/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:0 errors:0 dropped:0 overruns:0 frame:0          TX packets:282 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000           RX bytes:0 (0.0 B)  TX bytes:43778 (43.7 KB)
Cant configure networking between host and guest in vbox
networking;virtualbox