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Ticket Resolution Summary Owner Reporter
#20660 invalid hostonly network should allow all valid Private IPv4 ranges by default jehiah
Description

From https://www.virtualbox.org/manual/ch06.html#network_hostonly

VirtualBox will only allow IP addresses in 192.68.56.0/21 range to be assigned to host-only adapters. For IPv6 only link-local addresses are allowed.

By default VirtualBox should allow IPv4 ranges in all RFC 1918 Private IP ranges including

  • 10.0.0.0/8
  • 172.16.0.0/12
  • 192.168.0.0/16

This restriction (new in 6.1.28) was a breaking change for users using valid private IP addresses outside of 192.68.56.0/21.

#16911 fixed hostonly network broken on 5.1.24 mrvanes
Description

After upgrading to 5.1.24 my hostonly network failed:

$ ping 192.168.56.101
PING 192.168.56.101 (192.168.56.101) 56(84) bytes of data.
From 145.145.17.101 icmp_seq=12 Destination Net Unreachable

Probably because virtualbox failed to create a route for vboxnet0:

# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         194.171.172.1   0.0.0.0         UG    600    0        0 wlp59s0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlp59s0
194.171.172.0   0.0.0.0         255.255.252.0   U     600    0        0 wlp59s0

I tried to create a route by hand but this failed:

# ip route add 192.168.56.0/24 dev vboxnet0 
RTNETLINK answers: Network is down

Reverting back to 5.1.22 solved my problem. This was tested on a vanilla 4.12.1 kernel.

#17917 obsolete hostonly + allow all can't ping guest from host cderenne
Description

Host : Fedora 28, kernel =4.17.9-200.fc28.x86_64 VirtualBox : 5.2.16 Guest : MSEgde - Win10 image downloaded from Microsoft

I have 2 NIC : NIC1 : NAT NIC2 : HostOnly Promiscious mode = Allow All

The trouble : Host can't ping guest (ping 192.168.56.101 not working)

Over informations : Guest can reach internet (via the NAT nic) Guest can ping Host (via Hosonly nic) (Host IP is 192.168.56.1) Guest Host Only Nic is 192.168.56.1.101

When pinging 192.168.56.101 (the guest) from the Host Got no answer but I see the incoming packets in the guest NetwordCard status screen.

In my situation, I can't use Bridge network so I need the hostonly network working good to make the host reaching the guest

I hope you will fix that bug soon. Thanks for your job, I like VirtualBox !!

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