My topolgy:
My HP Desktop <----> CISCO PIX 515E Firewall <-----> Motorola cable modem <-----> ISP
What I am trying to do with Virtualbox is this:
1) Host:
-Lubuntu 14.04 (64 bit) installed with default kernel.
-I am going tu use this one for everything I do. (Internet, installing programs, study, os updates, etc)
2) Guest:
-Lubuntu 14.04 (64 bit) installed with Grsecurity Kernel (test) and all security options enable, trying to get the highest hardening kernel security I can get.
-I am not going to use this one at all, just for Grsecurity and OS updates.
What I am trying to do is to force all internet traffic go through VBox guest first and through grsecurity. Then it will go to VBox host, where I should be able to access internet normally. Making VBox guest kinda like a firewall. So if a hacker wants to hack the VBox host it would have do defeat or bypass first the VBox guest with grsecurity. I know I can use pfSense or IPFire etc. But in this case and for educational purposes I want to do it through Lubuntu 14.04 (64 bit) with grsecurity.
At this point I only need help with the VBox configuration. Wich adapters should I use? Bridge, NAT, Host-Only a combination. The configurations of gateways and IPs.
I found someone trying to do something similar, and I almost succed, I am able to have internet in guest but not in host when I use the command described there.
https://bbs.archlinux.org/viewtopic.php?id=178057
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