Host:
- Microsoft Windows 10 Enterprise
v.10.0.15063 Build 15063
Antivirus: Corporate controlled Windows Defender
User rights: Administrator, with a few exceptions (but I can access and/or change most)
Physical network cards:- Gigabit LAN
Dual-band AC WiFi
- Gigabit LAN
- Microsoft Windows 7 Professional
v.6.1.7601 Service Pack 1 Build 7601
Antivirus: Standard
User rights: Administrator
Configured network adapters:- Adapter 1:
- Attached to: Bridget Adapter
Name: Brigded to one of the above physical network (changed depending on requirements)
Adapter Type: Intel PRO/1000 MT Desktop (82540EM)
Promiscous Mode: Deny
- Attached to: Host-only Adapter
Name: VirtualBox Host-Only Ethernet Adapter
Adapter Type: Intel PRO/1000 MT Desktop (82540EM)
Promiscous Mode: Deny
- Attached to: Bridget Adapter
- Adapter 1:
- 5.1.22 r115126 (Qt5.6.2)
Preferences -> Network -> Host-only Networks -> VirtualBox Host-Only Ethernet Adapter:- IPv4 Address: 192.168.56.1
IPv4 Network Mask: 255.255.255.0
DHCP Server:- Server Address: 192.168.56.100
Server Mask: 255.255.255.0
Lower Address Bound: 192.168.56.101
Upper Address Bound: 192.168.56.254
- Server Address: 192.168.56.100
- IPv4 Address: 192.168.56.1
INFO: During below examples, it makes no difference whether the virtual network adapter 1 for the guest is connected the the physical LAN or WIFI adapter.
Example 1
- Host gigabit LAN adapter connected to DHCP enabled network
Host dual-band AC WiFi adapter disconnected (either not connected to a WiFi, or disabled under "Network Connections")
Result: Guest can PING host IP: 192.168.56.1, and programs inside the host can exchange data with services on the host. Everything is working as intended.
- Host gigabit LAN adapter connected to DHCP enabled network
Host dual-band AC WiFi adapter connected to WiFi (have tried with both DHCP and static IP without gateway configuration for this adapter during this example)
Result: Guest can not PING host IP: 192.168.56.1, and programs inside the host can not exchange data with services on the host. No connection through the host-only network.
- Host gigabit LAN adapter disconnected (either cable physically disconnected, or disabled under "Network Connections")
Host dual-band AC WiFi adapter connected to WiFi (have tried with both DHCP and static IP without gateway configuration for this adapter during this example)
Result: Guest can PING host IP: 192.168.56.1, and programs inside the host can exchange data with services on the host. Everything is working as intended.
To sum up the above. When only one physical host adapter is connected to a network and/or enabled at a time (example 1 and 3), the host-only network works as intended. However, when both physical host adapters are enabled and connected to different networks at the same time (example 2), all communication via the host-only network adapter is blocked/denied. Whether or not the IP configurations are DHCP or Static (without gateway) doesn't seem to influence the result.
Communication from host to both physically connected networks is working as intended, it is only the VirtualBox host-only network that stops working.
I have been working with this problem for a while (took me some time to actually realize why it sometimes were working, and sometimes not), googling a bunch, but I am running out of ideas as to what can cause the above described problem.
If any further info is needed, kindly ask, and I will provide as best as I can
Thanks in advance
Henrik V. Nielsen