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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rpload(1)						      General Commands Manual							 rpload(1)

NAME
rpload - alpine remote data utility SYNTAX
rpload [ -f ] [ -s trimSize ] -t Type -l Local_file -r Remote_folder DESCRIPTION
Rpload may be used to convert local Alpine configuration files or address books into remote configurations or address books. It is intended to be used by system administrators. Regular users should normally use the facilities provided within Alpine. Local_file will usually be a user's alpine configuration file, and Remote_folder is the IMAP folder which will be used (with the help of Alpine's -p, -P, and -x commands or PINECONF, PINERC, and PINERCEX environment variables) as the user's remote configuration folder. A copy of Local_file will be placed in the folder with the correct header lines to satisfy Alpine. -f Force the load even if the remote folder is in the wrong format. This will delete the contents of the folder so use it carefully. -s trimSize If the number of messages in the remote folder is more than one plus trimsize (one is for the header message), then messages 2, 3, and so on will be deleted until there are only one plus trimsize messages left. If this option is not set no trimming will be done. -t Type The possible Types are pinerc, abook, and sig. (Sig is mostly obsolete. Literal signatures contained within the remote pinerc should be used instead.) -l Local_file The file on this system that is to be copied. -r Remote_folder A remote folder name to be copied to. See the Alpine documentation for the syntax of a remote folder name. One exam- ple is {my.imap.server}remote_pinerc. DIAGNOSTICS
Exit status is zero if all goes well, -1 otherwise. SEE ALSO
Rpdump(1). Copyright 1989-2007 by the University of Washington. $Date: 2005/01/14 20:40:14 $ rpload(1)

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