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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

pam_guest

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

NAME

     pam_guest -- Guest PAM module

SYNOPSIS

     [service-name] module-type control-flag pam_guest [arguments]

DESCRIPTION

     The guest service module for PAM allows guest logins.  If successful, the pam_guest module sets the PAM environment variable GUEST to the
     login name.  The application can check this variable using pam_getenv(3) to differentiate guest logins from normal logins.

     The following options may be passed to the pam_guest module:

     guests=list    Comma-separated list of guest account names.  The default is ``guest''.  A typical value for ftpd(8) would be
		    ``anonymous,ftp''.

     nopass	    Omits the password prompt if the target account is on the list of guest accounts.

     pass_as_ruser  The password typed in by the user is exported as the PAM_RUSER item.  This is useful for applications like ftpd(8) where guest
		    users are encouraged to use their email address as password.

     pass_is_user   Requires the guest user to type in the guest account name as password.

SEE ALSO

     pam_get_item(3), pam_getenv(3), pam.conf(5), pam(8)

AUTHORS

     The pam_guest module and this manual page were developed for the FreeBSD Project by ThinkSec AS and NAI Labs, the Security Research Division
     of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS research program.

BSD
								   May 26, 2003 							       BSD