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Virtualbox guest as a firewall for lUbuntu host

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Special Forums Cybersecurity Virtualbox guest as a firewall for lUbuntu host
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Old 12-23-2015
Question Virtualbox guest as a firewall for lUbuntu host
Using virtualbox, I am trying to use Alpine linux (guest) as a firewall for my lubuntu (host). My physical network card (NIC) is eth0.

ISP WAN -> Alpine linux (guest) -> lubuntu (host) LAN

I am trying to get the ip from my ISP DHCP server but I had no success. I know that in virtualbox I have to use bridged adapter in eth0.
But in AlpineLinux (guest) do I have to create a vlan? Thats where I get confused.

ISP WAN -> DHCP -> Alpine linux (guest)

I was able to do this with two PCs like this:

ISP WAN --> Alpine linux firewall (PC1) --> Lubuntu LAN (PC2)

But now I am trying to do it with just one PC using virtualbox like this:

ISP WAN --> Alpine linux firewall (PC1) (Guest) --> Lubuntu LAN (PC1) (Host)
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LEARN ABOUT FREEBSD

hv_kvp_daemon

HV_KVP_DAEMON(8)					    BSD System Manager's Manual 					  HV_KVP_DAEMON(8)

NAME

     hv_kvp_daemon -- Hyper-V Key Value Pair Daemon

SYNOPSIS

     hv_kvp_daemon [-dn]

DESCRIPTION

     The hv_kvp_daemon daemon provides the ability to store, retrieve, modify and delete Key Value pairs for FreeBSD guest partitions running on
     Hyper-V.

     Hyper-V allows administrators to store custom metadata in the form of Key Value pairs inside the FreeBSD guest partition.	Administrators can
     use Windows Powershell scripts to add, read, modify and delete such Key Value pairs.

     The hv_kvp_daemon accepts Key Value pair management requests from the hv_utils(4) driver and performs the actual metadata management on the
     file-system.

     The same daemon and driver combination is also used to set and get IP addresses from a FreeBSD guest.

     The set functionality is particularly useful when the FreeBSD guest is assigned a static IP address and is failed over from one Hyper-V host
     to another.  After failover, Hyper-V uses the set IP functionality to automatically update the FreeBSD guest's IP address to its original
     static value.

     On the other hand, the get IP functionality is used to update the guest IP address in the Hyper-V management console window.

     The options are as follows:

     -d      Run as regular process instead of a daemon for debugging purpose.

     -n      Generate debugging output.

SEE ALSO

     hv_vmbus(4), hv_utils(4), hv_netvsc(4), hv_storvsc(4), hv_ata_pci_disengage(4), hv_kvp(4)

HISTORY

     Support for Hyper-V in the form of ports was first released in September 2013.  The daemon was developed through a joint effort between Cit-
     rix Inc., Microsoft Corp. and Network Appliance Inc..

AUTHORS

     FreeBSD support for hv_kvp_daemon was first added by Microsoft BSD Integration Services Team <bsdic@microsoft.com>.

BSD
								 October 27, 2014							       BSD