sniffing packets from different VM's in Oracle VM VirtualBox - virtual-machine

Question

There is a situation:
there are 2 Virtual computers(defined as A and B), runnig Ubuntu 16.04 each one.
Network configure on both of them:
Adapter1 : Host-only with Promiscuous Allow All
Adapter2: Nat Network with Promiscuous Allow VM's
both the computers have a difference mac addresses
PC A :
host only adapter with mac(080027B2EBC7)
NAT Network adapter with mac(0800273F605C)
PC B:
host onlt adapter with mac(0800272DC6FF)
Nat Network adapter with mac(080027B8CEC1)
computer A: sending a ping, through terminal, by the command :
ping google.com
while computer A is pinging im openning wireshark on computer B.
i cant see the icmp packets that im sending from PC A on the Wireshark on PC B.
ifconfig for both PC:
A:
enp0s3 Link encap:Ethernet HWaddr 08:00:27:b2:eb:c7
inet addr:192.168.56.103 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::717a:1d3f:cf7d:a25f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:83 errors:0 dropped:0 overruns:0 frame:0
TX packets:58 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8788 (8.7 KB) TX bytes:6807 (6.8 KB)
enp0s8 Link encap:Ethernet HWaddr 08:00:27:3f:60:5c
inet addr:10.0.2.4 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::955f:36a:18c3:706f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17 errors:0 dropped:0 overruns:0 frame:0
TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2689 (2.6 KB) TX bytes:7197 (7.1 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:71 errors:0 dropped:0 overruns:0 frame:0
TX packets:71 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:21609 (21.6 KB) TX bytes:21609 (21.6 KB)
B:
enp0s3 Link encap:Ethernet HWaddr 08:00:27:2d:c6:ff
inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::ca16:a283:da31:e0a2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:97 errors:0 dropped:0 overruns:0 frame:0
TX packets:55 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11541 (11.5 KB) TX bytes:6333 (6.3 KB)
enp0s8 Link encap:Ethernet HWaddr 08:00:27:b8:ce:c1
inet addr:10.0.2.7 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::b3c3:7fd:e18c:ccd3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:54 errors:0 dropped:0 overruns:0 frame:0
TX packets:58 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7449 (7.4 KB) TX bytes:6511 (6.5 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:95 errors:0 dropped:0 overruns:0 frame:0
TX packets:95 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
maybe im have a wrong understanding about the Idea of VM Networks.
Thanks for helping

Answer 1

You didn't stated you question clearly, but I presume you want to see ICMP traffic on VM-B, when you ping google from VM-A, if so, then you have a mistake:
Host-Only adapter via which you may reach VM-B doesn't work with outer/external/public (whatever is more clear) networks.
you can use this command to check which iface is used for routing:
ip route get $(host google.com | head -n1 | grep -oP '[0-9][0-9\.]+')
If you want to have it routed as VM-A -> VM-B -> internet, then you have to make default (or dedicated) routes for that