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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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pbuilder-uml.conf(5)						     pbuilder						      pbuilder-uml.conf(5)

NAME
pbuilder-uml.conf - configuration file for user-mode-linux port of pbuilder DESCRIPTION
/etc/pbuilder/pbuilder-uml.conf contains default values used in pbuilder-user-mode-linux program invocation. FORMAT
MY_ETH0=tuntap,,,192.168.0.2 Configures ethernet setting used for booting linux. See how rootstrap boots your system, and copy that. Specify --eth0=slirp,12345,/usr/bin/slirp-fullbolt to use the slirp connection. UML_IP=192.168.0.3 IP address to use for guest OS. This can be set to dhcp for obtaining IP address through DHCP. UML_NETMASK=255.255.255.0 Guest OS netmask UML_NETWORK=192.168.0.0 Guest OS network UML_BROADCAST=255.255.255.255 Guest OS broadcast UML_GATEWAY=192.168.0.1 Guest OS gateway PBUILDER_UML_IMAGE=${HOME}/uml-image Guest OS file system image. UML_MOUNT_TMPFS=no Whether to mount tmpfs inside the guest image. This is probably mostly useless. BUILDPLACE=${HOME}/tmp/ The location which build will take place. pbuilder-user-mode-linux will place temporary COW files to there. The user running UML needs to be able to access that directory. UML_MEM=128 The amount of memory allowed for UML. Give more value to here. UML_HOSTNAME=uml-host The hostname for the UML. The hostname should be available in /etc/hosts so that hostname -f will be able to return the FQDN. UML_BUILDRESULT=/directory/of/build/result The directory where build result of pbuilder-user-mode-linux is stored. ROOTSTRAP_IMAGESIZE=size-in-megabytes The size, in MB, of the disk iamge to create. Defaults to 1000. NOTES
It is advised to set APTCACHEHARDLINK to no in ~/.pbuilderrc. see pbuilderrc(5) for details. AUTHOR
Initial coding, and main maintenance is done by Junichi Uekawa <dancer@debian.org>. The homepage is available at http://pbuilder.alioth.debian.org FILES
/etc/pbuilder/pbuilder-uml.conf, ${HOME}/.pbuilderrc SEE ALSO
/usr/share/doc/pbuilder/pbuilder-doc.html, pbuilder-user-mode-linux(1), pbuilder(8), pbuilderrc(5), pdebuild(1) Debian 2003 Jan 8 pbuilder-uml.conf(5)

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