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Host Only Networking not working as described
Posted: 28. May 2014, 20:54
by joeller
I am puzzled. According the the manual Host-Only Networking is described as below.
the virtual machines can talk to each other and the host as if they were
connected through a physical ethernet switch.
I have two Virtual machines both implementing Host-Only Networking but each of them can only see the VBox server, (i.e. the host).
Re: Host Only Networking not working as described
Posted: 28. May 2014, 21:11
by Perryg
Firewall/s?
Same workgroup?
Same subnet?
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:04
by joeller
Windows Firewalls are off on both servers.
Both Servers belong to Workgroups which share the same name.
Sub net? No specific IP address was set so presumably they are set to dynamic.
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:14
by Perryg
Post the results of the following
It looks like you have Windows guest ( it helps if you state this in the beginning ). Run the following on both guests
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:23
by joeller
Windows 7 host, Windows 2003 R2 first guest; Windows 2008 R2 second guest.
Code: Select all
C:\_Program_Files_VFS\Oracle\VirtualBox>VBoxManage list hostonlyifs
Name: VirtualBox Host-Only Ethernet Adapter
GUID: 803ddb59-56cc-47c1-a24b-f7fed9c3f15f
DHCP: Disabled
IPAddress: 192.168.56.1
NetworkMask: 255.255.255.0
IPV6Address:
IPV6NetworkMaskPrefixLength: 0
HardwareAddress: 08:00:27:00:70:61
MediumType: Ethernet
Status: Up
VBoxNetworkName: HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter
First guest
C:\Documents and Settings\edward.joell>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : cpvfssql200364
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Desktop Adapt
Physical Address. . . . . . . . . : 08-00-27-28-A4-5A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.56.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 192.168.56.100
Lease Obtained. . . . . . . . . . : Thursday, May 29, 2014 8:52:18 AM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 9:52:18 AM
Second guest
C:\Documents and Settings\edward.joell>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : cpvfssql200364
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Desktop Adapt
Physical Address. . . . . . . . . : 08-00-27-28-A4-5A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.56.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 192.168.56.100
Lease Obtained. . . . . . . . . . : Thursday, May 29, 2014 8:52:18 AM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 9:52:18 AM
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:33
by Perryg
Were both guests running at the same time when you did the ipconfig?
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:36
by joeller
Yes
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:37
by Perryg
Wait a minute. It looks like the second guest was a clone of the first. As such the MAC address would need to be changed on one of them.
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:45
by joeller
It was not a clone. It was created from scatch.
Re: Host Only Networking not working as described
Posted: 29. May 2014, 16:58
by joeller
Also the shared clipboard does not work on the second guest, despite running guest additions for windows.
Re: Host Only Networking not working as described
Posted: 29. May 2014, 17:05
by joeller
Suddenly after that last reboot require after installing guest additions for the third time, suddenly the first VM is visible on the second VM.
But after a gratuitous reboot on the first VM the second VM is still not visible from there. (However since it is the DB server, and thesecond vm is the web server it is not really important that it see the second as long as the second sees the first.)
Update: Now suddenly the first VM can see the second VM if you click "Explore" in its workgroup under Microsoft Windows Networks in Windows explorer.
Re: Host Only Networking not working as described
Posted: 29. May 2014, 17:27
by Perryg
For what ever reason ( at least from the information you posted ) both guests have the exact same MAC address. This can not happen as it will cause network failure.
First guest
C:\Documents and Settings\edward.joell>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : cpvfssql200364
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Desktop Adapt
Physical Address. . . . . . . . . : 08-00-27-28-A4-5A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.56.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 192.168.56.100
Lease Obtained. . . . . . . . . . : Thursday, May 29, 2014 8:52:18 AM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 9:52:18 AM
Second guest
C:\Documents and Settings\edward.joell>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : cpvfssql200364
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Desktop Adapt
Physical Address. . . . . . . . . : 08-00-27-28-A4-5A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.56.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 192.168.56.100
Lease Obtained. . . . . . . . . . : Thursday, May 29, 2014 8:52:18 AM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 9:52:18 AM
Re: Host Only Networking not working as described
Posted: 29. May 2014, 17:36
by joeller
So:
1. Why would Virtual Box allow this to happen?
2. Why is the network working?
3. How does one rectify this?
Re: Host Only Networking not working as described
Posted: 29. May 2014, 17:45
by Perryg
VirtualBox has no control over what the user does. It provides the mechanism and its up to the user to configure the guests properly.
Looking closer it also appears that the host name is identical for both guests. This as well will stop normal network operations. Are you sure that you sent both machines ipconfig /all?
You don't need to resend them if in fact they are identical, just fix the issue.
1) change the MAC address of one.
2) change the host name of one.
Re: Host Only Networking not working as described
Posted: 29. May 2014, 18:06
by joeller
The second machine was created through the GUI with things like MAC and IP address being created as whatever VirtualBox put in there.
The host name is NOT the same for the two VM. Looking at the data it appears that the windows clipboard failed to overwrite its previous contents on a subsequent copy and paste. (This happens quite often on these machines.) Here is the actual ipconfig of second machine.
Code: Select all
Windows IP Configuration
Host Name . . . . . . . . . . . . : CPVFSWEB200864
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Desktop Adapter
Physical Address. . . . . . . . . : 08-00-27-58-43-9C
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5855:4a85:90d1:96e3%10(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.56.102(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, May 29, 2014 11:46:33 AM
Lease Expires . . . . . . . . . . : Thursday, May 29, 2014 12:46:34 PM
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 192.168.56.100
DHCPv6 IAID . . . . . . . . . . . : 235405351
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1B-16-BE-8A-08-00-27-58-43-9C
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.{456B660B-7516-46AE-A38B-FE03286B8BB0}:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Local Area Connection* 9:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
And the shared clipboard is still not working.