Failed to start virtualbox natnetwork

[Ireneusz Pluta]

Hello,

I am trying to use virtualbox natnetwork on a FreeBSD host. Natnetwork configuration seems to 
complete ok, but actual natnetwork start fails with
NS_ERROR_FAILURE (0x80004005), more details below. Is there a way to get it working?

Thanks
Irek.

$ uname -rs
FreeBSD 10.2-RELEASE-p7
$ VBoxManage --version
4.3.34_OSEr104062
$ VBoxManage list natnetworks
NetworkName:    czajnet
IP:             10.0.22.1
Network:        10.0.22.0/24
IPv6 Enabled:   No
IPv6 Prefix:
DHCP Enabled:   Yes
Enabled:        Yes
loopback mappings (ipv4)
         127.0.0.1=2

$ VBoxManage natnetwork start --netname czajnet
VBoxManage: error: Code NS_ERROR_FAILURE (0x80004005) - Operation failed (extended info not available)
VBoxManage: error: Context: "Start(Bstr("whatever").raw())" at line 449 of file VBoxManageNATNetwork.cpp
VBoxManage: error: Failed to start network