Nat network give same IP to hosts

[soysau]

I have 3 Ubuntu machines, all linked-cloned from first one. And I have a Nat Network with DHCP enabled. When I was on Virtualbox 5.x they were okey, but today I upgraded to 6.1 and the same hosts they all get the same IP 10.0.2.4/24. All MAC address are different.

They can barely ping to 1.1.1.1. They also resolve DNS. But they have all the same IP. I have some friends who have the same problem after upgrading.

[scottgus1]

Please post the command outputs of these commands, as text in

Code: Select all

 tags:
[pre][color=#800080]vboxmanage list natnets
vboxmanage list dhcpservers[/color][/pre]

Also put all three guests' .vbox files in a zip folder and post the zip using the forum's Upload Attachment tab.

[soysau]

Please post the command outputs of these commands, as text in code tags:

vboxmanage list natnets
vboxmanage list dhcpservers

Also put all three guests' .vbox files in a zip folder and post the zip using the forum's Upload Attachment tab.

Here are the output from vboxmanage list natnets

Code: Select all

NetworkName:    RedNat
IP:             10.0.2.1
Network:        10.0.2.0/24
IPv6 Enabled:   No
IPv6 Prefix:    fd17:625c:f037:2::/64
DHCP Enabled:   Yes
Enabled:        Yes
Port-forwarding (ipv4)
        ssh1:tcp:[127.0.0.1]:2200:[10.0.2.100]:22
        ssh2:tcp:[127.0.0.1]:2201:[10.0.2.200]:22
loopback mappings (ipv4)
        127.0.0.1=2

This one from vboxmanage list dhcpservers

Code: Select all

NetworkName:    HostInterfaceNetworking-vboxnet0
Dhcpd IP:       192.168.56.100
LowerIPAddress: 192.168.56.101
UpperIPAddress: 192.168.56.254
NetworkMask:    255.255.255.0
Enabled:        Yes
Global Configuration:
    minLeaseTime:     default
    defaultLeaseTime: default
    maxLeaseTime:     default
    Forced options:   None
    Suppressed opts.: None
        1/legacy: 255.255.255.0
Groups:               None
Individual Configs:   None

NetworkName:    NatNetwork
Dhcpd IP:       10.0.2.3
LowerIPAddress: 10.0.2.4
UpperIPAddress: 10.0.2.254
NetworkMask:    255.255.255.0
Enabled:        Yes
Global Configuration:
    minLeaseTime:     default
    defaultLeaseTime: default
    maxLeaseTime:     default
    Forced options:   None
    Suppressed opts.: None
        1/legacy: 255.255.255.0
        3/legacy: 10.0.2.1
        6/legacy: 10.0.2.1
Groups:               None
Individual Configs:   None

NetworkName:    RedNat
Dhcpd IP:       10.0.2.3
LowerIPAddress: 10.0.2.4
UpperIPAddress: 10.0.2.254
NetworkMask:    255.255.255.0
Enabled:        Yes
Global Configuration:
    minLeaseTime:     default
    defaultLeaseTime: default
    maxLeaseTime:     default
    Forced options:   None
    Suppressed opts.: None
        1/legacy: 255.255.255.0
        3/legacy: 10.0.2.1
        6/legacy: 10.0.2.1
Groups:               None
Individual Configs:   None

I also saw that this happens only in machines that are cloned from original one. So, this 3 machines are cloned from one. Link-clone.
This didn't happen in 5.x Virtualbox version.

Thanks for the reply!